Er, I thought I was agreeing with you. What do you think I'm arguing? To be clear, I view these two statements as grounded in the same logic, although perhaps one is more strongly worded than the other:
Yours - "So unless someone has the resources to test and deploy unstable web servers, it effectively means you shouldn't bother with spdy at this point."
Mine - "I think it's a fair assessment that supporting experimental technologies requires more engineering resources. Everyone has to do the cost/benefit analysis themselves."