If I look at stats the month previous leading up to Feb 20 (i.e. before the 'event') I see a fairly even spread across :-
ntt communications corp
if I look at traffic from 21st Feb (start date) to 29th Feb (date it leveled off to approx 30%) I see this :-
road runner 10% of total
comcast 10% of total
Previously road runner or comcast only had 3-4% of total. In other words the traffic sources were more evenly spaced.
This might mean feck all but I though I would throw it out there.