What strain of yeast was it? Arguably, temps over 78 could be detrimental to the yeast. Perhaps it could be that some people may have difficulty quickly chilling their wort much below 78, especially in the summer.
Frankly, it is better to get your pitch temp closer to your fermentation temp.
Brody's Brew House
Primary: Sweet Potato Saison(
Seconary: Don't use one, generally
Kegged: Scottish Strong Ale
Planned: Either a Porter or an AIPA. Possibly a RIS.
"For a quart of ale is a dish for a king." - Shakespeare