Thanks for the voice of reason. Was kind of how I'm feeling, but hard to tell her that her shiny new super cool watch is just going to get more nicked up. lol
If you are upfront with the Genius Bar, they might be nice and offer an out-of-warranty repair gratis. In any case, they'll at least give you an estimate for fixing it. It does seem odd that it would scratch so quickly without her noticing bumping into things.
For version 2, you might consider splurging the extra $200 for the stainless steel. The sapphire crystal will avoid scratching on the screen (I've had sapphire crystal watches for years). However, the stainless steel watch body itself will be much more prone to scratching than the Series 7000 aluminum of the Sport. 9to5Mac already has an article about this. Stainless steel can be buffed/polished, however, even with a DIY kit (just don't polish more than once or twice a year, though).