I'm quite sure Colin Weaver knows genetics enough to know this is not true.
The snake could have come from a super black pastel x honeybee, and then all the offspring would be either black pastel het hypo or black bee het hypo. So even if black bees aren't visually different from regular spiders, the genetics would be known.
The pic does look a little darker and less golden than an average spider to me, but that could be the lighting or even just a spider on the darker end of the normal spider range, so I too would like to know if there is a visual clue we have all missed that makes it obviously a black bee.