SSD'd do offer massive increase in performance (do your homework). The increase comes in small read/writes, something we do very often, like 90% of the time. You could open and close 10 apps (SSD) in the time it takes you to open just 1 (HDD). Don't speak of things you have not experienced wirh yourself. 20% better fuel econemy also.
Quotes from a few MBA reviews...
"I used the SSD model in the same manner I used the HDD model—mostly for writing, surfing, chatting, the occasional photo tweak, and watching a bit of streaming video. For the most part, the SSD model felt exactly the same as the HDD model—the OS can only get so Snappy™ before it all blends together. Going about my daily business, I couldn't tell a noticeable difference between the two machines in terms of everyday speed."
" I experienced only moderate gains in battery life and not very noticeable speed differences. "
"Ive owned the samsung sata-II 64gb SSD drive put it in my mbp and didnt feel that much of a difference because it lacked cache. But boot time was fast... that's about it.. ran pretty hot as well.."
"ssd is not worth the cost at the moment. it is better, but not triple digit dollar better."
"However, the speed launch trick is only impressive at the first launch of an application after a reboot. Mac OS X aggressively caches data to allow the slower HDD launch its applications nearly as fast on a second try (below)."
"we managed to pull a full five hours and ten minutes of use from the HDD Air, and fifteen minutes less time from SSD Air doing similar but not identical work. "
Moot point - as you suggest an HDD SMALLER than the one he's already complained as being too small - but SSD's make sense only if you are literally made of money. For the rest of us - they make no sense at all, yet.