Windows 7 x64
He doesn't say which version of Avast he is using though probably 5.x
He also doesn't say how much RAM the computer has.
He also doesn't say if all the scans were done on the same computer or not.
Avast Quick Scan on 64GB OCZ Vertex 2 SSD
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Date of Scan 12/18/10
Files - 31,058
Folders - 18,314
GB - 15.9
Time- 22 seconds
http://www.youtube.com/watch?v=arU2-ZpJSWUAvast Quick Scan on Crucial C300 64GB SSD
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Date of Scan 2/19/11
Files - 28,790
Folders - 17,434
GB - 12.7
Time- 44 seconds
http://www.youtube.com/watch?v=5j0ULNDZJAcAvast Quick Scan on WD Caviar 250GB Sata3 HDD
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Date of Scan 12/18/10
Same data loaded as on 64GB OCZ Vertex 2 SSD. He stopped the scan at 1:06 with only 5.5 GB scanned
Files - 8,819
Folders - 5,670
GB - 5.5
Time- 66 seconds
http://www.youtube.com/watch?v=zbCn7iDOSMABy comparison I just did a Quick Scan with Firefox 4 open with 8 Tabs
Western Digital WD5000AAKS-75V0A0 Hard Drive
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Files - 115,034
Folders - 24,064
GB - 21.3
Time- 340 seconds
I will now close Firefox clean the HDD and rescan
After closing Firefox and cleaning the HDD
Western Digital WD5000AAKS-75V0A0 Hard Drive
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Files - 115,015
Folders - 23,417
GB - 21.3
Time- 325 seconds
I did one last scan - Same as above except I closed SAS in addition to Firefox
No meaningful change in time from the previous scan