So I was under the impression that Samsung's garbage collection tech only worked on NTFS file systems. My drive, a Corsair P256, has very noticeably slowed down in day to day use. And earlier today I complained about the lack of TRIM support in OS X:

The results above suck. Well below what my drive did out of the box.

For the hell of it, I decided to log out of my machine to see if garbage collection would kick in. About 2 hours later I ran XBench again:

And Again:

I'll be leaving my machine logged out more often until Apple gets on the TRIM bandwagon.