Scott,
I'm OK with disagreement; I get plenty. I think the plants' ability to survive those hot days/ warm nights has everything to do with how the plant has been set up to survive that. I'm not talking the past few months, but rather the past several years. And with that I will bow out of the discussion as I no longer am a superintendent.
I would agree with Scott, 100%, but also state that member/player demands and expectations play a vital roll in how each course is maintained and how the Superintendent maintains it. This doesn't include the debate on turf types in difference regions and/or soil conditions it's grown on.
Members at a club like Scott's caliber don't want a "survive of the fitness" turf and/or tolerate too much that isn't cosmetically pleasing to the eye. Case in point the remarks made about the last 2 US Opens.
Every turf type has its threshold. Do you think that all the Supts on the NE, Midwest, Chicago who lost their poa greens because of ice didn't set the plant up to survive that? A cool season grass such as bent and/or poa will always struggle with temps start pushing 90+. that's there breaking point. Too much "drought dormancy" on bent of poa is death. Plain and simple. It doesn't bounce back. We, as an industry, don't believe because it's generally not a fact.