What brand of SSD does apple use for their LATE 2011 MacBook Pros?
I bought a Apple SSD which is OEMed from Toshiba.  The model is TS256C. http://www.tuaw.com/2011/04/17/apple-adds-speedier-ssds-to-latest-batch-of-macbook-airs/

When installing this SSD into my later 2008 MBP, the TRIM is automatically enabled in Lion.  However, other brand SSD, you may need to manually enable the TRIM.

So I guess the later 2011 MBP may using the same OEMed Toshiba SSD.