I just received my new MBA and ran xbench. The 128GB SSD is fast! However, when looking through the uploaded results on the Xbench website, I noticed a difference in the SSD description for posts starting in early May 2010. Before that time, the stock SSD drive is listed as: APPLE SSD SM128 And after that it is listed as: APPLE SSD TS128B Take a look. The disk test scores are dramatically higher for the "TS128B" than for the "SM128" (disk test score of 211 vs. 83!) I just picked a random system for the SM128: http://db.xbench.com/merge.xhtml?doc2=443973 Here is my system with TS128B: http://db.xbench.com/merge.xhtml?doc2=457854 These results put the current stock SSD on par with the Runcore SSD, and in the "Random" score the stock SSD outperforms the Runcore. I don't believe these faster scores are due to improvements in 10.6.4 since there the change in the SSD occurred some time in May (apparently) and you can see posts on the Xbench site with the fast scores on systems using 10.6.3. So, it appears Apple quietly updated the SSD on the MBA and didn't say anything. Anyone concur?