I just bought a used 2011 iMac, which included an apple-installed 256GB SSD. I just tested the read/write speeds of the drive which came in at 215 Read/185 Write compared to the HD which was 125 read/125 Write. I was aware that the factory installed SSD's did not perform as well as 3rd party SSD's like OCZ, Crucial, & OWC, but I didn't realize it was this underwhelming. I've read that those other brands are getting 400+ Read speeds. Why is the factory installed SSD so much slower, and if I brought it back to Apple, would there be any newer options to have them install a faster SSD? I don't want to install one myself...the process seemed fairly simple, but I don't want to void my applecare warranty, which has another 18 months remaining. Also, I like having the internal superdrive, and don't want to remove it.