Has that actually been studied? I mean, is there a quantifiable "2 second impression" that can be measured as different between Roboto and Source Sans? I see this kind of argument made all the time by afficionados of some aesthetic or another (microbrew fans, car nuts, etc...) and invariably the science ends up showing that e.g. wine quality can't be measured objectively at all.
My point here isn't (ahem) "You are wrong.", but more that I think you need to get some perspective about the distinction between strongly held opinion and objective fact.
Yep, there is quite a problem with that. I've recently was looking for proof that Golden Ratio aesthetical qualities are indeed the global optima for at least some categories of objects. I've found nothing.
There's at least one published study with a very large sampling base. I know because I was as skeptical as you are, then I saw the study mentioned in some design book, looked it up and it did in fact exist. I'll try and find the name, but I'm not sure if I still got the book where it was mentioned.
My point here isn't (ahem) "You are wrong.", but more that I think you need to get some perspective about the distinction between strongly held opinion and objective fact.