Str82u - 3:20 pm on Apr 12, 2013 (gmt 0)
@backdraft7 - I'm very certain that HG isn't causing you any traffic issues, maybe slight delays but not what you've been describing as long as you've been describing it. Yes.... very certain.
Are you using a dedicated box or shared? Don't answer, but if it's shared, check your neighbors if you haven't already.
EDIT: Actually "very" wouldn't apply if HG was singling you out for some reason but that doesn't seem plausible unless you had a site that's a trouble maker.