Well my main house in Scotland uses a cable connection, and MLU loads up in two or three seconds, worst case. I did speed check it last month and got 3Mb/sec, which is good, as I'm paying for 2 Mb/sec
My rented house (work location in Aberdeen) uses ADSL, which says up to 2 Mb/sec, but it is noticeably slower to load anything, maybe 5 to 10 seconds. That compares at pretty much the same ratio as it loads everything else.
I've recently had to experiment with several firewall programmes too, and neither Zone Alarm, Comodo, or Sunbelt coughs when MLU is clicked.