JIT for Java

How does a relatively slow processor like the Xscale run programs in a bytecode language like Java and not have performance suck as a result?

One technique is JIT. So does Blackberry implement JIT? The reasonably good performance of sophisticated apps like Browser lead me to believe so. here (google cache link, the original article is behind a login screen here) is an article from 2002 in System News that talks about the then-new topic of productizing Java JIT on ARM and includes some quotes from RIM folks.