Wow, I thought mine was fast, but it's slower than everyone else's above.
But mine is BIGGER!
512 GB SSD
Model: Apple SSD TS512C
Mfgr: Toshiba
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That seems a bit slow, even for the Toshiba. It is on a 6Gbps controller now, and that should give you speeds in the 350-400 Mbps range. In any case, you might try another benchmark, since sometimes a controller can give a benchmark a fit, and thus it won't generate a reliable result. Sandforce controllers in particular seem prone to this. I think it has something to do with how the controller treats compressed data vs. uncompressed data. I've read that the Toshiba is a customized Sandforce.