You are not alone, My 2820N will sync at 3.2mb on ADSL2+ but my netgear will sync at 6.2mb.

I am waiting for the next firmware release before shouting too much.

At the moment I have a very expensive Wireless access point/DHCP server (the Draytek 2820n)

Something I have noticed is that if you are rebooting your router you will get the best sync speed in the morning.

Read your posts and I had the same problem a couple of months ago when I changed over to O2 broadband. My Draytek 2820Vn sync'd over a meg less than the O2 Wireless Box II.

I have since played around with the O2 Wirless box so that it is running in 'Bridged' mode and then plugged into my Wan 2 port of the 2820.

I get the sync speed I want and at the same time get to run and managed it all from the 2820.

There are plenty of posts through a google search on hacking the O2 box so it runs in bridge mode. Otherwise, would recommend buying a stand alone modem that has good sync speeds like a Netgear.........

At present, my O2 box sync's at 18.4 down and 1.3 up. Using the 2820 modem, the D/L sync is 16.8.

Point to note as well and as I found out the hard way, when I was testing different modems, then configuring the O2 box, this obviously dropped my connection a handful of times. This as a consequence raised an alarm with O2 that there is a fault on the line and my speed was reduced.

Once I had configured everything and both 2820 and O2 box were talking to each other and an internet connection was established, I rang up O2 and got them to reset the SNR Margin. My speed was back to normal within a matter of seconds.....

Hope this helps