Now that Windows 7 is released by Microsoft, for World of Warcraft (WoW), is there really a performance improvement over Windows Vista? Awhile ago when Windows 7 was in Beta, many posted improvements to their gaming experience with multiple windows of WoW running.

In looking at the fine print from Microsoft, awhile back they claimed there was going to be a major improvement in performance in Windows 7 over Vista. However, now that it has been released, I can't find any specifics on how Windows 7 is better in performance over Vista from Microsoft.

The thing is, even if they said it was better I wouldn't necessarily believe it until I heard it from users that were actually experiencing a performance improvement. So I'd like to ask the community that runs software similar to the way I do which is multiple windows of WoW (I run up to 4 in each computer) to find out if it is really worth the upgrade to Windows 7.

NOTE: The ONLY reason I would want to upgrade is if there is a performance improvement in running multiple windows of WoW. I don't care about any of the flashy changes they've made in the operating system. I don't care about the security improvements they claim. I'm running Vista with all the latest security updates and I'm happy with the way the operating system works as a whole. However, sometimes during intense battles in Wintergrasp, Alterac Valley or in Dalaran, the graphics lags some on all of my systems.

I have one older duo core laptop with Windows XP 32bit that has 256mb of ram on the ATI Video card. The laptop is the Fujitisu N6420 and it can run 3 instances of WoW better than one of my desktops that run Windows Vista 32bit. The desktop is the m9060n from Hewlett Packard with the Quad CPU Q6600 3gb ram and the nVidia 9800GT. It has a base score of 5.5 in the Windows Experience Index. Both systems have a completely pared down environment with only Octopus and WoW running. This leads me to believe that Vista is worse in performance with graphics applications over Windows XP. Someone told me that Windows 7 gets back to the performance that Windows XP had.

I'm interested in hearing from anyone that has experience with performance improvements in Windows 7 over Windows Vista when running multiple copies of WoW on the same computer that has been upgraded. I'm looking at getting the Windows 7 family pack but don't want to do the upgrade if there isn't a performance improvement with running multiple WoW instances.

Thanks.