As of now as far as I am aware (because the Kingstons have not launched yet?) there are no SSD that have a garbage collection utility onboard. They simply do not exist. As I explained elsewhere the only ones that may have it already are the Intels. And that's only the Intels. Sandforce does not and that includes the Revodrive. There is no way to get any kind of garbage collection going on those. Right now Sandforce drives have the TRIM command in their bios for a single drive. When you negate to use that controller and put the drives into RAID you kiss it goodbye.
Also I would like to know who these 'people' you refer to are, and who 'they' are.
I bought a Corsair X32 in January. It did not support TRIM. I benched it three times one after the other with ATTO and by the time I was done performance was down 60%. When you benchmark an SSD large chunks of data are written to and read from before it all being deleted at the end. An SSD works with cells. However, unlike a hard drive that you can defragment and rewrite 0 clusters over the 1s you have written you can not do that with an SSD. So the more you read and write (and delete) from one the slower it becomes. People have tried to stop the drive reading and writing to maintain performance but it doesn't work. Temp internet files, temp files and folders will all be created and deleted by Windows. To try and combat this I put on Vista (no point in using 7 as my drive did not have TRIM) and cut the absolute crap out of it. I then stopped everything I could from reading and writing to it and within 60 days it was crawling.
So whoever has told you that TRIM can be gotten around and fooled is a moron.
Don't trust reviewers unless they are trustable. As for the Revodrive? well, here is clipping of a review I read recently.
While the performance of the Revo when handling compressible files (as in the ATTO test) is fantastic, the obvious performance drop that hits the Revo following heavy use is a huge cause for concern. Following heavy use, the card was actually slower than a Crucial C300 128GB. Having spent the last year worrying about getting TRIM support onto its SSDs with firmware upgrades, for OCZ to release a product that resoundingly ignores it is baffling. Even more worrying is that because the drive controllers sit behind the RAID controller, it’s extremely unlikely that OCZ will be able to deploy firmware upgrades for the Revo.
Emphasis added.