Malware Sample takes so long a time to process?

I uploaded a virus sample to avast! three days ago (and I kept doing so in the last few days), and now some other vendors are able to detect it, while avast! still take it as a clean file.
While I understand avast! got so many samples per day, I don’t understand the fact that since the samples submitted through virus chest are processed automatically, why it takes AVAST soooooo long to process?
http://www.virustotal.com/file-scan/report.html?id=6bbfe466a53a58346b951d125bff0757e1392c9f0dce4352f59df9dc7cb7e8aa-1302606382

Difficult to judge but, indeed, seems infected (I bet on Symantec detection).
It’s a pity that samples can’t be added that fast…

This could have been the initial scan (same size - date first found): http://www.virscan.org/report/d8c1634453b2f4e93cfbff1a526dd213.html

now we stand at 7 /42 (16.7%) but avast has not added it to detection:
http://www.virustotal.com/file-scan/report.html?id=6bbfe466a53a58346b951d125bff0757e1392c9f0dce4352f59df9dc7cb7e8aa-1302620054

polonus

Avast detects now: http://www.virustotal.com/file-scan/report.html?id=6bbfe466a53a58346b951d125bff0757e1392c9f0dce4352f59df9dc7cb7e8aa-1302832881
as Other:Malware-gen, so ziucqea you can add [SOLVED] to the original posting, like I did,

polonus