To be fair, that traffic graph is pretty misleading. It looks like it's dropping many orders of magnitude, but really the drop is from around 850 to 400. It looks more extreme than it really is because the limits of the Y axis are from 990 to 320.
Fiddling with the range of a graph when people will assume it's 0 to something is pretty dodgy. Not to mention there's no key on it to say what the numbers stand for.
Sure, I don't mean to say anyone's being malicious here, I'm just saying, it's a shame to look at that graph and think "Oh wow what a big deal this is!" when really you're being shocked by the choice of y axis range.
Fiddling with the range of a graph when people will assume it's 0 to something is pretty dodgy. Not to mention there's no key on it to say what the numbers stand for.