I would say no. I don't know all that much about how the traffic stats accumulate but I have noticed that about once a month, I see a big drop for a day or so and then it picks back up. I've noticed that during those times, my traffic sources do weird things like showing a negative number of visitors from one or two sites on the list. Finally, it doesn't seem to influence earnings on those days.
These things have led me to believe that there's some sort of "catch up" period where HP merges traffic and earnings in some way. I can't explain it well, but it shouldn't affect actual traffic.