Lemme tell you something:
The Toshiba 256GB SSD I got CTO'd in my MBP 17", is the biggest piece of sh** drive I've used in my entire life. The go*dam thing putters along at the slowest speed possible if you throw a few simultaneous I/O ops at it.
Purchasing it was the biggest mistake of my life, and I'm trying to figure out how the hell to either get a refund for it (heh, fat chance), or at least get it exchanged to see if there's a problem with it.
Operations pause constantly. It's slow as hell. It's a complete piece of garbage. The entire machine is brought to its *knees* because of it.
My former Air had the 64GB SSD. And while it may not have been *actually faster*, it *felt* obscenely faster. No pausing, consistent speeds, throw a handful of operations at it and it handled it without beachballing.
Yeah yeah, someone tell me how I should run some benchmarks or some crap. I don't give a flying f**k - all I care about is, *can I use my machine* while the drive is operating. And know what? I can't.
ARGGGGH. Sorry for the cursing, but no other way to describe the dramatic decrease in productivity and enjoyment because of this crap. =| SO BE WARNED.