Witnessed something funny yesterday in PMI: ATC applied 2 minutes wake turbulence separation between 738s, told the succeeding every time to be cautious because of the wake turbulences caused by the 2 minutes prior departed HEAVY 738 in front. The A320 in between all those 738s was not deemed a heavy though, wonder if the A330s were treated as such.
I know they always called a departing 738 a heavy which was always some source of amusement, however seeing them playing the part to the end and that way running out of time for some slotted departures is not really funny at all.