Why no one talk about VERY bad on-demand scan speed?
For me it's not "VERY bad". I can live with avasts speed, and I don't have a bus to catch 
I have to agree with Bluesman, for me the scan isn't slow at all, especially on this new system. Even on my old system it wasn't slow (but I don't have huge amounts of data). I have a number of other on-demand scanners (anti-spyware). SAS is much slower than avast and it doesn't scan anywhere near the same number of files. Whilst avast doesn't do a specific registry scan that part of SAS doesn't take long, but the avast scan also does an anti-rootkit scan (which is very quick) as part of the scan.
I also set it at avast on-demand scans to Standard sensitivity and you don't say what scan speed you use. In the test avast starts on the default setting of Standard, but upon first detection it automatically bumps that up to Thorough, which would slow the scan considerably.
I generally don't hang around watching a scan, I much prefer to go off and get a coffee, etc. so speed isn't an absolute essential, but avast isn't slow by any standard. However when comparing speed you have to ensure you are comparing apples with apples or the comparison is worthless.
There is also the work around for scheduled scans in the home version if you want to fire it and go to bed.
