Sure, the Wii line
consumed entire days of weary E3 visitor's schedules, as Nintendo bottlenecked the fawning throngs into a single drip feed. But the open-to-the-public TGS line is on a scale all its own, extending from the entrance of the Makuhari Messe convention cener in Chiba, all the way to the trains from Tokyo that appeared to be delivering eager pilgrims to the event quicker than the event could absorb them into its fold.
This video clocks in at a foot-anchingly long twelve minutes. We don't recommend watching the entire thing ... maybe just jump from part to part. Or use a stopwatch to count down twelve minutes and then check in at the end. If we can assume that our walking speed was about 4mph (the average is three, but we were walking pretty fast), and it took us twelve minutes, the line was roughly 0.8 miles. And growing.