I'm quite sold on thorusa. Even though I bought my Dahon elsewhere, Thor took care of me when I had a warranty issue with my hinge. He didn't even charge me for shipping. Notably, the shop from which I bought the bike wasn't helpful at all.
Sure he's running a business and wants to attract customers, but my take is that that is not his only motivation; he seems genuinely enthusiastic about bikes and wants all riders to have a good experience.