BB:
I can tell you that during football season, Millenium definitely deals dual lines. Anyone who opens an account and mentions Phil Steele is given an account number that is automatically recognized both when you call in or are online. When Steele releases his plays with the current line at 11:00 a.m. EST, Millenium will hold that line for those people that hold these specific accounts for 30 minutes. This is both Saturday and Sunday. I have seen somedays where the line has moved 3 points or more in that half hour and Millenium is still holding for those customers while all other offshore books have moved. As to other sports, I have no knowledge either way. The former, I have first hand knowledge of it's truth.