That's a nice theory. But so far I haven't seen a single demo of B2G running on "low-end hardware". I've only seen it running on last year's high-end Galaxy S2 phone, which still costs like $500 unlocked.

I also don't know how Javascript can possibly run any faster than Java apps, especially on low-end hardware. Unless all you're showing is a webpage with text?

Show me B2G on a 600 Mhz ARM11 CPU phone, that's faster than Android, and then I'll buy it.