18mb/sec d/l speed is more than adequate for EQ.
For instance, my connection speed is 2 mbps d/l and 1 mbps u/l and it takes about 1-2 hours to load EQ on a new computer..And this is from the Caribbean, so the packets have to travel a longer distance.
This is using the old diskset (EQ - Titanium Edition 5 disc set from 2005 iirc) to start the process, after which the new patcher automatically overwrites the old one that was default on the discs.
I believe that if you go anywhere else to purchase the game, you will still have to activate it from the SOE-EQ patcher anyways. As they no longer sell the game from discs or "over the counter".
I have 3 computers each with different windows and browsers and they all work fine with EQ..Including one older Dell XPS600 desktop with IE8 and windows XP.
My advice would be to d/l directly from the EQ site. Maybe it is your router or switch if applicable, though mine is over 5 years old and handles the game fine.
Good luck.
Edited, Jul 21st 2013 1:12pm by hexeez