While I wanna agree with you being a Darkglass owner, I don't know of a single heavy music bass player in all of the Boston area that has a Darkglass amp, (myself excepted). So many internet dudes, no one out there playing them, at least around here. I don't think they have the market penetration you think they have. Maybe ImI wrong but I've never seen a single one in New England.
I just saw the bassist for Crowbar using a Darkglass amp on their supporting tour with Corrosion of Conformity.
Side note, he was so buried in the mix he could have not even had an amp at all.