Yeah, I surely wouldn't say that...
Kirupa is a great alternative to here, and really, the only other AS-specific forum I even bother with outside of this one, but, that said...
This is all my personal opinion and based on my own experiences there, but I find Kirupa (.com, not Kirupa himself) to be much less friendly, as where AS.org has a pretty cheery disposition in general. The Mods here do a fantastic job of keeping this forum clean, on-topic, and family-friendly. I don't find that to be quite as true at Kirupa. People can get nasty there, and there seems to be a lot more off-topic conversations going on. Not that that's a bad thing, but it does dillute the forum from a strictly script perspective a little bit.
I also find it to be the complete opposite of what you said. I tend to see way more amateurs there, and a lot more old, uncommented code and obsolete practices. For example, say you posted a script here that was meant to go on a symbol. You will typically get someone trying to push you away from that practice and explain why here, as where on Kirupa, you'd probably just get an answer written in that context. Granted, some people might find that to be what they are after, but AS.org pushes people to be better, not just get the answer they are looking for and move on.
I personally don't think there is any comparison. Kirupa is a great, helpful site, but I don't frequent it half as often as as.org. Just my two cents.