George:
Re. Medinah -- I think, if I recall correctly, that the area was hit with a pretty drenching thunderstorm Saturday night that softened things out. I do recall that Curtis Strange -- only two off the lead going into Sunday, and in serious contention for a third straight Open title -- complained pretty loudly about what he viewed as the lack of truly difficult conditions at Medinah generally, and particularly the last round. Irwin shot a 5-under 67 that Sunday to get to the playoff. (Medinah's first round lead that year was -6 ((three players)), second round lead at -9, third-round lead at -7, with -8 getting two players into a playoff -- par was 72 that year.)
Richard:
BBlack did see record-low scoring rounds -- Weir led with a 64 after one round (13 players under par after one round) and Barnes' 132 (67-65) was a record-low 36-hole total. The course firmed up on the weekend (doesn't BB sit on much sandier soils than Congressional?), as winds picked up, the course dried out some, and the USGA started putting in more difficult pin placements. I seem to recall some criticism of crusty, hard-to-judge greens as well.