Have just upgraded to 60 mg broadband on virgin, placed the virgin modem router in modem mode only but when I carry out a speed test it is limited to @20mg via wire through my draytek router,
the 2910 has the latest software,
when I put the virgin superhub back to normal and connect my computer to it via wire it gives me the full speed so it would appear to be the draytek modem that is the limiting factor.
I am a bit disappointed as I thought it should cope.

I'm not sure what the maximum was, but I'd guess the vigor 2910 can't support 80Mb/s full whack;
it was superceded by the Vigor 2920 some time ago.