Yes, those guys are certainly experimenting with some tricky time signatures, but remember that musical "intelligence" can be reflected on many other levels, too: mature thematic development, harmonic sophistication, lyric content, etc.
Don't get me wrong. I was raised on classic prog rock, and I love that stuff, too. But I've learned that different styles of music have different elements to explore in depth. For example, in jazz it's all about improvisational interplay and manipulating the harmony to tweak the listener's ear.
Here, I'll throw in a shameless plug for my own music, which has been described as pretty cerebral stuff in it's own way:
http://www.dougross.net
Maybe I'll try to sneak in more odd meters in the future....
