Is this a reliable tell?

[shag]

Live 1/2NL in NYC. Player I have seen there often but never seen win makes a large raise on the flop. After he makes his bet and I am thinking he talks to his neighbor acting very uninterested in the hand. Laughing... etc. I took this actually as a sign of streangth from a player who hardly raises ever and folded my two pair.

Is this reliable at a game like this?

Shag