I also find that text selecting is "laggy," but my main problem is trying to select more text than is on the page. starting at the beginning of the desired text and then drawing the stylus down to the bottom of the page doesn't induce tear (at least not very often) to continue highlighting text that was originally off-screen. So i find myself zooming out and then selecting all the next I want. But that is a total pain.

Not that I'm complaining though!