If it's her first iPhone and she wants the "advantage" of a physical keyboard, I would tell her to give the soft keyboard a week or two.
I can do 64wpm on my iPhone because I just "trust" it. It's not perfect but it's damn good and I love the fact that my fingers can just skip across the surface without any need to press in on a key.
Also, on the iPhone, you know exactly what you're hitting by the big letter that pops up above each key. If you make a mistake, you just keep typing hitting the space bar because 95% of the time it gets it right and all you have to do is confirm the correction with a tap of the space bar.
Also, the Blackberry's browser sucks, it's not even a web-kit based browser, so it's not as fast.
If all she does is text and email, and I mean all, then maybe a bold is a good choice. But I still stand firm that the iPhone keyboard is just as good, except for having to look at it.