Clay - actually, these days, I see so many posts here saying the exact same thing about too long in foil and everyone just chooses to adapt or not using foil any longer.
3-2-1 is a guide, not a rule.
Not sure who started it, but for all we know there pit thermometer could have been off by 40 degrees...
Lonestar 24" Vertical offset w/ Insulated Firebox & Performer Platinum
Former owner: Jambo Backyard, Klose BYC, Med. Spicewine, Pitts & Spitts, XL & (2) Med. BGE's, 22" WSM & (2) 18" WSM's, 18" & 22" Weber Kettles