Thanks, gents.
The reason I asked was because I thought most All Terrain tires were LT-metric until I found a Consumer Reports rating of AT tires where BFG TA K/Os were not even considered, then I found that it was a test of P-metric tires only. Most other reviews I have found seem to be evaluating LT-metric only.
According to Toyo, the only downside to replacing P-metric tires with LT-metric ones is that they "may cause unacceptable vehicle ride and handling qualities."
http://www.toyojapan.com/tires/pdf/Infl ... essure.pdf
By the way, if you're interested in the Consumer Reports rating (not sure what the rating criteria were):
Nitto Terra Grappler AT
Bridgestone Dueler APT III
Bridgestone Dueler A/T Revo
Toyo Open Country A/T
Kumho 825 Road Venture AT
Hankook Dynapro AT RF08
Cooper Discoverer ATR
Firestone Destination A/T
BFGoodrich Rugged Trail T/A
Yokohama Geolandar A/T + II
Goodyear Wrangler AT/S
Uniroyal Laredo AWT
Continental ContiTrac TR