I had to learn Prolog for a university paper and I have to agree; out of the dozen-ish languages I've had to learn, something just didn't "click" with Prolog.
replyNo real value is this comment, I'm just happy to share a moment over the brain-fuck that is Prolog (ironically Brainfuck made a whole lot more sense).
I wouldn't really try to equate arbitrary job titles awarded based on tenure with actual expertise; titles aren't consistently applied across the industry, or awarded on conditions other than actual merit.
replyThere are a lot of very young developers who have less years of experience than me who have tons more expertise than me.
replyThe problem is, as is evident by this article and thread, it's difficult to measure (and thus communicate) expertise, but it's really easy to measure years of experience.