Using version 88 (thanks, marc0s_h4f!), I was able to perform much more efficient attack on router, that in last tests, was repeating less and less reliably over time (I described it as going quickly to 1% or so, then, considerably loosing performance, so after 10 hours it was still 1,81%).

Now it's waring from 6 seconds/attemp (!) to 12-13, and in few hours I got 10% already. I think there are good chances, that it's going to be first "regular" WPS router cracked by me, by pure "reaver" method which is nice, as - otherwise - it's WPA2-AES, with damn-long-passphrase (no chances to crack it other way, ever).

/Estel