I always think they make that number up to make it sound good. I forgot to log on at 10 am - it was 10:17 when I remembered and still only the first two dates were listed and I was queueing for tickets. Then at about 11 the rest of the dates appeared, 11:45 I finally got my ticket. If they'd really all gone (for one date) in less than 44 seconds then there is no way I'd have got one nearly two hours later.
20,000 tickets in < 44 s
100,000 tickets in ~ 220 s
Just looked on stubhub and the cheapest ticket is about £200 - most expensive now going for £4k (I've checked my seat - going for about 3x face value - but I'm not selling).