Some good points.
If I get in this situation I'll be sure to check his 3bet% but the sample as mentioned isn't the biggest but he is tight.
I guess I need to just keep playing, get my database of hands up so I can get better reads and get the sample size up.
Next time, I'm jammin'
small samples can still have some use. he has 3bet 3% in 80 hands which I imagine will prolly be 1 time out of around 30 opportunities, whereas the sample isn't big enough to tell us he is actually a nit (he might be good TAG) but what it does tell us is he hasn't yet shown any signs of being capable of being anything other than a nit - so it is therefore impossible to credit him for too wide of a 3bet range with the info we have atm.