His point though is that JITs (like LuaJIT) are often not allowed on consoles for security reasons - they don't allow running of unsigned code. So LuaJIT might not be an option.
As myrmidon said, LuaJIT ships with a very fast interpreter.
What I was trying to say is that, while its not as fast as JIT or AOT, it is still extremely fast (many times faster than the reference Lua implementation apparently).
LuaJIT contains a pretty fast interpreter, thus it makes sense to use it on consoles (with the JIT turned off by compile-time-flags) instead of the Lua reference implementation.
