In my area I can get a max of 4.5mb.
I used to get 4MB but suffer disconnections once a day, but I would still sync at enough to give me 4MB.
My ISP got BT to increase my SNR to 9 to stop the disconnections, which worked but gave me a max of 3.5MB. This was around a month ago.
This morning my IP Profile was 3500 and my sync was around 4050. I rebooted my modem, and immediatly I had a sync of 4650, and my ip profile immedialty increased to 4000!
This is since upgrading to the latest firmware on my netgear dg834g so not sure whether it's this that's done it for me.
The big test will be this evening because I always used to disconnect between 6pm and 8pm - if this happens, I will suffer because my IP profile will drop to 3500 because of the drastic drop in sync. I'm hoping the new firmware solves this though, although if my SNR is slightly raised to 9, I doubt it, but it's worth a try.
Must say, I didn't know IP profiles updated that quickly, usually take 3 days. I did check my ip profile last night and it was 3500, this morning when I rebooted it went to 4000.
I think maybe if you sync higher or lower by 500, your ip profile must auto increase immedialty.
MY STATS AS OF 1.12PM TODAY:
Connection Speed 4672 kbps 448 kbps
Line Attenuation 49 db 14.5 db
Noise Margin 8 db 21 db
IP PROFILE 4000