[RandALLin]

Eh, I think timing tells are kind of important here. Also, what spade/spade combo hand calls here preflop alot? I guess you could db him, then decide. It is pretty much read based IMO as each case here has some piece of little info that makes it a call/fold. I think the longer he takes before the river shove the more likely I am to fold as the faster he shoves the river makes me want to call.