So, I'm now running Yosemite beta on my 15" rMBP and it looks and feels superb. Hard to believe it's a beta. Actually I feel like it runs way smoother than Mavericks. No lags or stuttering or anything. In Mavericks I noticed slight micro lags and stuttering time to time. Nothing major, but it was still there. Now in Yosemite beta it's all gone. Anyone else feels like Yosemite beta is running noticeably smoother than Mavericks?