Warren buffet is definitely a quant (he does his homework) even if he doesn't use heavy duty math (though I'm sure he has access to that).

Then you are using the wrong term. Value investors (those who use models such as DCF and DDM) are not considered 'quants' in the investment community. My point is, quants can be speculators too (and more often than not they are). I just wanted to point out (in a somewhat pedantic manner) that the above comment is just a random comment, without any substance.