When you head to Apple's online store to configure your MacBook Air, you'll find options to increase processor speed or SSD capacity -- depending on the model you select, of course. There's no mention of flash drive speed, however, though it's now clear that not all SSDs are created equal at Apple -- not only when it comes to capacity, but also performance. Jonathan over at TLD discovered a fairly significant discrepancy when benchmarking both MacBook Air models over the weekend. The 128GB Samsung SSD in his 11-inch Air was able to achieve 246 MB/s write and 264 MB/s read speeds. When he switched to the 13-inch mod