What comes to the original subject, I personally couldn't give a shit about the roundtimelimit-setting. I'd say finishing a
normal rushy round in a
normal map doesn't take even close to 90 seconds, more like 30, so who cares whether the limit is 90 or 120 secs? Of course it's polite to inform your opponent about any special setting used in your map, preferably before the clanwar, but I don't see changing a setting that basically doesn't affect anything as such a big deal. But I guess this wasn't about the limit itself anyway, but the way Ambush was acting. Caracol said he won't take that kinda arrogance, some people would. And that's why I think I have to agree with Caracol, there should be a standard to avoid situations like this, because not all people think the same way.
And for the highlander-part, I think a good map is a good map despite the weapons people are using.

But hey, I wouldn't know much about highlanders anyway. I think I've played one or two HL-games, and can't really remember how they were. And it's only minchiano's dream, let the man have his dreams!