Why is my MacBook Pro so slow?

I run a Win 7 x64 VM here with Fusion assigned with 4GB and I don't notice any slowdown of OS X apps when it is running.

HD I/O and CPU usage is tiny when windows is sitting there doing nothing.

Windows however does have a habit of doing random things when it is there sat 'idle' for a while.

But either way, my 2010 15" MBP with SSD + 8GB manages fine :p
VM runs off a different disk to OS X, but even when it didn't I don't remember OS X suffering.
 
Okay, maybe not that much better. If I boot Windows 8, or another VM in Parallels the whole system locks up for indefinite periods. I booked it in at Apple and at first they tried to blame the SSD, but after an email to the store manager they conceded that the drive is fine.

After spending 2 days with Apple, they agree that there is a fault however they could only offer the advice of rebuilding the OS. Which I've done but it hasn't helped.

What sort of angle can I push with Apple? The Mac passes all hardware tests in store (or so they say), but there is clearly something wrong with it which they also admit.
 
Well it seems as if the upgrade to Mountain Lion has fixed it. Were there inherent performance issues in Lion which Apple simply ignored till the new OS was out?
 
Well it seems as if the upgrade to Mountain Lion has fixed it. Were there inherent performance issues in Lion which Apple simply ignored till the new OS was out?

Lion was 'slower' then ML and SL but i haven't had any of the issues you've described on my iMac (running Lion) so if you ask me the problem still must have been something else.
 
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