I voted yes. But I'm also going to add a little info as to why I'm probably not having the problems so many are having.
First off, I do not use bloatware (Norton, Mcafee, Zone Alarm) Instead I use AVG anti virus (its free BTW) which uses a fraction of the resources. I also do not use a software firewall, I use a hardware firewall via a router. Next I run Spybot S&D, Windows anti spyware, and Lava Soft anti spyware once a week after doing a virus scan ( all of these are free as well) then I do a clean disc and defrag evrey couple of weeks. Then I use EndItAll before I game to shut down all the unnecessary crap running in the background .
The 2 systems I have are;
P4 3.0 Gig/ 1 Gig Pc3200/GF6600gt/ Win XP Pro
AMD 4000+/2 gigs PC 3200/ Dual 6800 GT's/ Win XP Pro
The second rig is my main gaming rig (obviously) and its easily understandable why that one will run anything out there even though its not "bleeding edge"
But the first one is pretty run of the mill, and probably at or below todays average, and guess what....it too will also run anything out there including RO at full settings.
The biggest problem I believe is that there are many who dont fully understand optimizing what they have, and rely on any game that they may play to do it for them. Do some googling, and find some reputable and popular tweak sites. I think there is a lot that can be done on the part of the user to avoid easily avoidable problems. Hopes this at least helps someone in some small way.