Lxde is great though and sure id believe that. I ran lxde on a single-core Phenom low power thing and with a SSD it was marginally usable even with that complete shit hardware.
I actually would not be surprised if, at the extreme low-end like the V140 or the Atom netbooks, that a SSD actually produced measurable increases in CPU performance. Not only do you have iowait which generally doesn't count as "idle" time according to linux (and probably windows) cpu utilization metrics, but even if you account for iowait, swapping off for another task while you iowait likely does have a performance hit in terms of caches that are no longer hot and so on, so performance is likely diminished when you come back to it too. And with no SMT, and only a single thread, context switching does become comparatively much more expensive in that fashion.
In that form factor, and costing what it did, I was massively impressed.