I thought it was, but a friend of mine suggests that it's not a split.

He posed this question to me:
"If you have pocket jacks, and someone's betting strong, and the flop comes J-K-K, turn K, and river K, and the one person left in the game bet strong preflop, weak on the flop and turn, and then went all in on the river, your correct action is to Call or Fold, and why?"

I said:
" Call, it's a split pot."

He replied:
"Actually, it's more intricate than I thought.

Fold, he's got you outkicked, more likely than not.

Think about it. His betting preflop suggests high cards. He had no king, and a jack is unlikely, so he's holding an ace, or he's holding a queen. More likely the ace, since he jammed the last card.

The best you can hope for is a split pot because you're playing the board. You HAD a killer hand after the flop, but now you're playing four kings, jack kicker. If he has a queen or ace, you're screwed. If he doesn't, you split the pot."

Do kickers even count in this situation?
Or does it depend on the site you play on.
I've always had the impression that it was a split.