Yeah, leaving it at that should be good... I'd say that's fair to keep such things to one's self and not be posting all over the internets.
That's a decent laptop, btw, speed of encoding is really dependent on the CPU more than anything else. Only other thing would be USB limitations - if you're stuck at 2.0 on the machine, that's as fast as you can get, unless you had an add-on card that did 3.0.
Any further thoughts on the menu/disc construction? All the reading I've done over that past day makes it seem like it's a little more work than DVD authoring..