Diversity? Maybe. Widely available diversity? No, not really. Going out to any random (non-brewery) bar, I see the same local breweries: Widmer, Deschutes, and Rogue. They all make rather hoppy beers (roughly in that order of increasing hoppiness). Plus, a lot of the smaller places follow the trend (e.g. Old Market in Multnomah Village).

I will admit it's probably easier for me to find beer that makes me happy in Portland than in almost anywhere else I've been. Partially this is a indication of how little I've travelled, but it's also a testament to the variety you can find here.