Mountain Lion might run amazing well for you, but for the majority of users, 10.7.5 is more stable and reliable than 10.8.0, 10.8.1, and 10.8.2. Yes, Lion does suck, and Mountain Lion has the potential to be better than Lion, but as of 10.8.2, Mountain Lion still has far more bugs than 10.7.5.
For your information, I own the latest 13" MacBook Pro, and it's maxed out with 16GB of Crucial-brand RAM.
Having the latest system doesn't mean anything. I didn't say you had a low powered system, I said you need to work on your system. Probably stuff you have installed doesn't agree with ML.
I have 5 Macs in my house including my family that have Macs with ML. No issues. I'm on this forum quite a bit and I don't see many threads of any major issues with ML, in fact around the web ML has gotten very good reviews. Since you said the "Majority" are having problems with ML, I'm going to Macworld SF tomorrow and Friday. I will ask the major podcasters that are friends of mine and I'll ask the vendors there of their experience with ML.