I don't have a very good internet connection but I don't have problems even when there's masses of people unless I run in windowed mode. Is your PC on the high end of the requirements?
FFXI:Sylph - Perrin 75 Hume THF; Retired (At least from my use any way)
EVE Online:ScraperX; Retired
WAR:IronClaw- Peryn SW;SkullThrone- Grymloc BO; Retired