I've noticed no speed differences between Lion and Snow Leopard... Really, it's all the interface paradigm changes that will bug you the most. As Amiga users we have 26 years of training in the old Deaktop model... Lion gets rid of things (optionally, but by default) that probably don't rely make sense, but we have grown used to.
It's a good upgrade, and while I think there are a number of missteps... It does show the future of the desk top... This Apple does, not by innovation but by simply having the balls to do it!
I could not agree more with Bloodline. I kind of miss the old Spaces but MC is ok. There are a lot of bugs in Lion so I'm sure 10.7.1 is in the works as we speak.
In the end, it's a good OS and shows where things are going. Windows 8 will really have to be something special to keep step with OS X.
I do think OS X - as we know it now - is at an end. I think Apple will end OS X on Lion given any cat name after Lion will seem lower. iOS is from OS X so I think the next OS will just continue to blend the interface ideals together. I'm not sure I'm happy with that.
If you are thinking of upgrading, do it. For the $30 you pay it is a great bargain. Though the price is to lure you further down the Apple iOS-Cloud-App-Store road so no surprises there.
Cheers!
-P
