I've made a wee video of how my M001 Android tablet performs configured with:
ECOTOX v1.1.1 (based on Eken official v1.7.4 / Android v1.6) custom firmware (comes pre-rooted)
Home++ launcher / home app
96MB Linux swap partition on sdcard
The intention here is to show you what it looks like. To me, this is much faster and more responsive than the software that comes pre-loaded (v1.7.2) or the official v1.7.4 update.
I didn't make a video of the official software as i didn't have enough battery. I left the charger at work tonight. Oops. In any case, I leave it to you to decide whether or not what you're seeing is fast enough.....whether you've seen any other flavour or not.
Bear in mind this is a very cheap, low spec device. I got it on TradeMe for $156. It can be had for less.
I was looking at the M001 through the viewfinder on my SONY camera, so had a little finger trouble with fine movements on the keyboard as i couldn't see it very well.