You do get a few geeks in blues music arguing about meaningless stuff, but it's not as common as it is with folk or old time music.

I think the main difference is that getting even half good in the general area of blues guitar is such a difficult thing that nobody with any chops is going to care about splitting the differences between Chicago and Delta blues.

In folk and old time music the skill level is so generally low at the pro level that arguing over meaningless stuff works as a bluff. They can't "do" anything outside of a memorized list of tunes and they compensate for that by turning even the most simple musical question into a big steamy lead of bullshit.

-Patrick