I don't know what it is with the Ps3/Gran turismo servers.
Last updates took 20-40 minutes per update maybe more.
what i dislike, the installation from ps3 to GT6 also takes long times.
My internet: 80 MBPS down 17 MBPS up, realtime that is 10Mb download and 2MB upload. (1Byte is 8bits, MBPS=megabitpersecond divide by 8 and you get the MegaByte value)
On Wifi, i got the first big update,lots of minutes, i stopped it, plugged a cable, changed settings on the ps3.
Again, lots of minutes, changed again some settings, no change.
Switched to dynamic IP adres instead of DHCP, nope still the same
Switching from wifi to cable should double the speed, it did not.
My conclusion without any real proof
It is the server containing the updates.
Maybe it is the same server that some online players are on?
It is wierd.