If, in a technical settings, someone consciously interprets the valley girl sound itself as an indication of inarticulate, insincere, and disinterested; then, then they’re perpetuating biases against a regional accent, which is completely unacceptable. The harder problem is getting people to notice when they’re unconsciously doing so, and then to compensate for their own bias when listening to – and judging – others.

(Your comment makes sense otherwise, no argument here — I’m only here for the valley girl subthread.)