Just got a mid-2013 Macbook Air 11" from the refurb store today. It has a 256GB SSD labeled "Apple SSD TS0256F." I assume that means Toshiba. Based on reviews and reading the forums, I was expecting write/read speeds of ~700/700. But BlackMagic is showing more like 500/600 for this Toshiba drive. Anybody else have a Toshiba SSD in a mid-2013 Air? Doesn't seem to be the norm as far as I can tell. And I know the 2011/2012 Airs with Toshiba SSD had some seriously high failure rates. Must admit, I'm a bit concerned.