I love that there are some people here that seem to think they are entitled to something or that 37s or DHH owes you something. It's open source, you have 3 options: 1. Fix it and get kudos. 2. Don't fix it (because your either too dumb or too lazy) and work around it. 3. Don't use it.
But coming on here and making some generalized proclamation that RoR is slow is irresponsible and unacceptable, IMO.
Maybe the 37signals don't give a damn about who is using their framework. That would also be an indicator against using it, because it would mean bad support. If they do care about who is using it, then they might also care about people's opinions about it. I think Open Source projects DO compete - just think about the submissions you request. If an open source project is not popular, nobody will submit patches or features for it, either. Then it won't grow, and eventually die.
RoR is not a panacea, but it certainly is "good enough" for a lot of things, think of all the 37 Signals apps.
I wonder, though, if this case of Open Source fury is directly related to the Twitter vs RoR debate, and also to DHHs attitude? Serious question - I don't know about DHH well enough to judge his attitude, it's just a feeling that is in the air.
I'm still not sure what you're trying to say about the Rails framework in general, I've never had an issue using it, or contributing to it.