Oops, I spoke too soon. I forgot that the Edge 305 pauses everything when you stop, even overall time. So what the Garmin calls overall time is actually on the bike time. If you add my 4 minute stop to the 4:57 time the Garmin recorded, you get my real overall time, per timing chip, 5:01.
HHH is 101.8 miles. So I can still say I've done 100 miles in less than 5 hours, but I can't say I've completed HHH in less than 5 hours. You can find your timer chip time
here.
I counted 5,342 timer results, so lots of folks either didn't put on the chip or didn't start at the start.