I can't believe some people here are freaking out about these comments and how Win should be 'grateful' to U2 and never criticize them. What a load of crap! Like many others have said, he wasn't bashing U2 altogether, just making a point about their marketing strategies. I happen to agree with him, and I would be willing to bet that U2 won't have any problems with these comments. Bono has always been a big mouth himself, he has made tons of comments in the past that could be compared to this one, and I think he appreciates artists that speak their mind.
You can criticize people you respect and appreciate. It's allowed, and in fact commendable. I do it all the time. Arcade Fire has so far never done anything they don't feel like just for the sake of marketing themselves, so the very fact that they agreed to open for U2 in a big arena and have their song used on their tour means they like and respect U2. Their song Rebellion was used recently for a Red add at Bono's request, and on their website Win explains why he thinks it's a good cause and a good idea and they couldn't say no etc.
The fact is the reason why Arcade Fire is so hyped right now is strickly due to the sheer quality of their music. Everything went off through word of mouth at the beginning, and they are themselves taken aback by their own success. U2 is not the reason they are popular right now, although obviously they did give them a little push (so did many other artists). They genuinely do not like the whole business, marketing side of music today, and want to try as much as possible to concentrate on the music and not have people like them for the wrong reasons, which is why they don't do many interviews or marketing. I really respect that.
Of course Win's way of saying things is not exactly diplomatic or delicate, he just says what's on his mind in a very direct, un-rehearsed way, and he's like that on any subject. I absolutely love that in an artist (or in anyone for that matter). Actually, it reminds me very much of a young Bono.
So all of you accusing Arcade Fire of using U2 to market themselves, or being ungrateful, just chill out. And go buy Neon Bible when it comes out, it's fucking amazing.