I think that we are talking about the flash storage on Mac ( specially on the mac retina so I just want people to use the same term use by apple ) see tech spec from apple description. the Retina Display like the Air is base flash-based architecture. you can understand better that for RAM we are talking about 1600Mhz. and for the flash storage I read somewhere that is up the 500mb/s. data transfer. MacBook Pro with Retina display uses one of the fastest memory technologies available today — 1600MHz, Double Data Rate (DDR3L), synchronous dynamic random-access memory (SDRAM) — ensuring that the Intel Core i7 processor is constantly fed with data without wasting clock cycles. http://9to5mac.com/2012/06/18/on-the-new-15-inch-macbook-pro-with-retina-display-review/ 2.6GHz quad-core Intel Core i7 Turbo Boost up to 3.6GHz 8GB 1600MHz memory 512GB flash storage1 Intel HD Graphics 4000 NVIDIA GeForce GT 650M with 1GB of GDDR5 memory Built-in battery (7 hours)2 Tel me if I'm wrong. Thanks for the link really...
Flash Storage and Flash Memory it's all in the name. Easy Flash Storage is on a separate card with a special Apple connector, we don't know when and if a third party will make an other size available. Flash Memory this is soldered on the board. impossible to upgrade or change. I really recommande to upgrade the Memory to 16GB. and for the storage, 512gb is good for me and if I need more space I use my 16TB NAS at home and I can access it form anywhere so I can stream stuff back to my MAC RETINA.