The judge was biased, partial but not ignorant.
Come on, you're a professional photographer but don't know the speed of your lenses? She had an 18-55 and a 70-300, sounds like the kit lenses from the package she bought on e-bay. I'm not saying she was totally in the wrong, but if you go into court and can't even tell the judge the Fstop range on your 18-55 kit lens, you're asking to get screwed.
But as other threads demonstrate, "professional" is a rather vague term. If the bride really did any pricing, and I'm willing to bet she did, she knew these weren't the best in town -- not at that price. Is it fair to compare a Focus to a Ferrari? They were hired because they were cheap over the quality of their work.
How well the photogs answered the questions about the equipment is completely irrelevant IMHO... The question should have been whether the finished product was comparable to what she should have expected at that price. Was the quality of the finished product comparable to the portfolio the bride saw before she hired them? The one that the bride found to be of acceptable quality and presumeably shot with the same gear by the same incompetant photogs...
And what was the deal with the prints from Walmart???? That part bothers me a lot. The judgement might have been right (I don't know), but for none of the reasons given. The whole thing went way off track and and really proved nothing except Joe Brown fancies himself a qualified photography critic.