At 8PM on Friday, I've spent 40 mins going from LGA -> Van Wyck (which I blame it on Brooklyn people & their Jackie Robinson Pkwy) and another 40 mins going from Van Wyck -> JFK (which I blame it on Brooklyn people going to Long Island).
End result for me was to buy a walk-up fare (on a $500 JFK-ZRH ticket) & pay the fare difference of $4,000. I cried for two weeks after that day