FlyerTalk Evangelist
Join Date: Aug 2011
Location: Barcelona, London, on a plane
Programs: BA Silver, TK E+, AA PP, Hyatt Globalist, Marriott LT Plat, Hilton Diamond
Posts: 13,046
It's worth adding that IB pad their schedules quite substantially in order to claim an excellent on-time record. So under normal circumstances you'll be off the plane as scheduled, if not before.
And the doors don't usually close promptly on US flights when there are lots of passengers struggling to get through secondary security...
IB wouldn't risk paying out EU261 compensation by selling "too short" connections.