Hi Ayashe. I am in the Firestorm support group and like you I notice residents needing help with the current update. I'm certain more than three of four need help, but even if, say, 100 residents are experiencing reduced performance this is a drop in the bucket when compared to all the residents having zero or minimal problems! There are thousands who use the Firestorm viewer. It's easy to get a skewed idea pertaining to the scope of the problem when we only hear from those needing support, and we don't hear from those doing fine.
Likewise, this skewed perception affects the forum. Those having problems are very loud! I can't blame them really as they love SL and want the thing to work! But still, we need to keep in mind that we are likely getting a distorted perception when we only pay attention to those who are upset and not hearing from all the others who are doing fine or only minimally affected.
Personally, my old desktop isn't the greatest, and I do see some diminished performance, but nothing to write home about.