Yes, but.
If you go to ten minutes, you can probably stretch to 15 without much effort, because one might easily be delayed by that much just by queuing for coffe a bit too long. Adding another 50% to your figures.

And rush hour trains will be over-capacity, with people crammed in every inch. Let's say another 10%.

And then of course, by the same definition, the people who got the trains in the same time period before the bombings had the same narrow escape. Double the figures.

36,000 or so people, which, let's be honest, doesn't exactly make it breaking news to be part of that group. This 'narrow escape' is going to have to be pretty wide to fit that many people into it. And that's just one incident.
(Falstaff's Spiritual Successor, Fri 20 Aug 2010, 11:22, Reply)