Upgrade to 12.04 really slow

[David L]

Hi,

I have a fast internet connection (25Mbps down, 7 up) and it
says it will take days to complete the upgrade to 12.04.  So I
downloaded the alternate install CD and tried to upgrade from the
CD without using internet by using cdromupgrade and telling it to
not get updates from the internet and it still said it was going to
take more than a day ...and it seemed to be trying to download
packages from the internet at ~10 KB/sec even though I had the
iso loopback mounted and told it not to use the internet.  My
upgrade from 11.04 to 11.10 took a few hours.  I downloaded the
12.04 iso through torrent in <10 minutes.

Anybody know why upgrading to 12.04 is so slow for me?

Thanks,

         David

PS - my computer is pretty fast with 4GB of memory
(AMD Phenom II X6 1055T Processor)