If you have 30 years total xp, but only 5 years working with a given program/language/etc; how does that make you any different than a guy with 5 years xp in that language
Because the specifics of the language is the least important part of software engineering.
This statement is precisely why software engineering isn't engineering.
----------------- The famous interview a carpenter like a developer sketch -----------------
Interviewer: So, you're a carpenter, are you?
Carpenter: That's right, that's what I do.
Interviewer: How long have you been doing it?
Carpenter: Ten years.
Interviewer: Great, that's good. Now, I have a few technical questions to ask you to see if you're a fit for our team. OK?
Carpenter: Sure, that'd be fine.
Interviewer: First of all, we're working in a subdivision building a lot of brown houses. Have you built a lot of brown houses before?
Carpenter: Well, I'm a carpenter, so I build houses, and people pretty much paint them the way they want.
Interviewer: Yes, I understand that, but can you give me an idea of how much experience you have with brown? Roughly.
Carpenter: Gosh, I really don't know. Once they're built I don't care what color they get painted. Maybe six months?
Interviewer: Six months? Well, we were looking for someone with a lot more brown experience, but let me ask you some more questions.
Carpenter: Well, OK, but paint is paint, you know.
Interviewer: OK. Hang on let me check off the box...
Carpenter: Go right ahead.
Interviewer: OK, one more thing for today. We're using Rock 5.1 to bang nails with. Have you used Rock 5.1?
Carpenter: [Turning white...] Well, I know a lot of carpenters are starting to use rocks to bang nails with since Craftsman bought a quarry, but you know, to be honest I've had more luck with my nailgun. Or a hammer, for that matter. I find I hit my fingers too much with the rock, and my other hand hurts because the rock is so big.
Interviewer: But other companies are using rocks. Are you saying rocks don't work?
Carpenter: No, I'm not saying rocks don't work, exactly, it's just that I think nail guns work better.
Interviewer: Well, our architects have all started using rocks, and they like it.
Carpenter: Well, sure they do, but I bang nails all day, and -- well, look, I need the work, so I'm definitely willing to use rocks if you want. I try to keep an open mind.
Interviewer: OK, well we have a few other candidates we're looking at, so we'll let you know.
Carpenter: Well, thanks for your time. I enjoyed meeting you.
Interviewer: Actually, we have. We liked your experience overall, but we decided to go with someone who has done a lot of work with brown.
Carpenter: Really, is that it? So I lost the job because I didn't have enough brown?
Interviewer: Well, it was partly that, but partly we got the other fellow a lot cheaper.
Carpenter: Really -- how much experience does he have?
Interviewer: Well, he's not really a carpenter, he's a car salesman -- but he's sold a lot of brown cars