"Over the years, IT has had a real love affair with XP," said Diane Hagglund, a senior analyst at Dimensional Research, and the author of a poll that surveyed over 900 IT professionals in January.
"It was just a great OS. It just worked for them. But that feeling is going away."
According to Hagglund, 60 percent of those polled said that they were more concerned about the cost and overhead of migrating to Windows 7 than they were about continuing to supporting the nearly-nine-year-old Windows XP.
The remaining 40 percent felt the opposite, that they were more worried about holding XP's hand than migrating to Windows 7.
While the majority is still with XP on this, the trend is towards Windows 7, Hagglund noted.
In April 2009, when Dimensional did a similar survey and asked the same question of IT administrators, 72 percent sided with XP, only 28 percent with Windows 7.
In other words, one out of every six IT professionals who last year would have taken XP over Windows 7 was won over by the new operating system in the intervening nine months.
"Windows 7 is looking pretty good to more businesses," said Hagglund.
"Part of what's happening with XP, I think, is like when you're very wedded to the spouse you have because there's no other choice. But now, there's this other one out there," she continued, casting Windows 7 as that younger trophy spouse.
The push to move off Windows XP may accelerate as its support retirement date approaches; Microsoft will stop shipping security updates for the aged OS in April 2014.
But the increased faith in Windows 7, which Microsoft launched last October, is an even bigger factor, Hagglund maintained.
"The vibes for Windows 7 have been very positive, especially when compared to Vista's," she said.
Hagglund highlighted some of the results from her survey to prove her point.
IT professionals are almost twice as likely to say that they're planning to deploy Windows 7 than they were at the same point in Vista's career, while more than half said they would move to the new OS by the end of this year.
And confidence in Windows 7 has climbed since the OS shipped.
Last April, 67 percent of those polled said they had concerns about the upcoming operating system; this year, only 56 percent said they did.
"The difference was the release of the operating system, the biggest part of that from hands-on experience," Hagglund said as she explained why some in IT have changed their minds about Windows 7.
"They're trying it at home, many of them, long before it comes to them professionally, so they know what it's like."
IT's specific concerns about Windows 7 have also changed.
While 62 percent of those polled last April said they were worried about Windows 7's stability and 47 percent expressed concern over its performance, in the most recent survey, those numbers fell to 41percent and 25 percent, respectively.
"What I see that saying is that Microsoft did a great job with this thing," said Hagglund, "because the concerns about Windows 7 that Microsoft had the most control over, like stability and performance, are the ones where fewer people are worried".
Hagglund admitted to only one survey result that took her aback.
"I was shocked by how few said they weren't waiting for SP1," she said.
More than two in five (46 percent) of those polled said they wouldn't wait for Windows 7 Service Pack 1 (SP1) to deploy the operating system.
"That may not sound like a lot, but for IT, it's a huge number," Hagglund added, referring to the tradition among businesses to wait for an operating system's first service pack before migrating.
Two weeks ago, when a usually-accurate site reported that Microsoft had ditched plans to postpone Windows 7 SP1, Michael Cherry, an analyst with Directions on Microsoft, argued that if there was a time to ignore the SP1 tradition, this was it.
"This time, waiting for SP1 may be doing yourself a disservice," Cherry said at the time.
Dimensional's survey was conducted for Kace, a systems management appliance company that was acquired by computer maker Dell last month.