I understand how annoying your issue can be... I have gotten used to ClearType, but before I was used to it, I found it quite annoying. I hope there'd be a way to turn it off for all programs... some monitors are not suited for it either.
I'm going to hold out until the final release to pass any kind of major judgement. It looks ok now, but if systems are going to take a performance hit, I'll have doubts. Some
early benchmarks have been taken on high-end systems for games that didn't look too positive, but this is with beta code. I'm remaining optimistic there will be some big improvements made for performance.