So how big was it *really*?

So we all have heard the breathless news reports of how the recent urinating contest between Spamhaus and a butthurt ISP was the "biggest in history". Where would you guys put it, if measured as "percent of total worldwide available Internet bandwidth/resources"? My gut feeling is that by that metric, it didn't even make the top 20. Think back to the Morris worm, or Blaster/Nachi/etc - *nobody* had any free bandwidth when those happened. And even if you restrict the discussion to intentional targeted attacks, I'm sure we've had worse (Smurf, anybody? :)