I'm not the parent, but lots of people complain that the SC2 maps are too small. You can quickly get to your opponents base on small maps which making early agression powerful, resulting in a lot of short games. If you've watched the last two GSLs, you probably noticed a lot of < 10 minute games (e.g lots of 2 rax all-in/pressure builds). By contrast, SC:BW games tend to be a lot longer and more exciting where you get to see many if not all expansions on the map taken, more strategy when it comes to unit composition besides just "well you weren't ready for my early game push so I just won easily", map control becomes essential, harassment, etc.

It requires more dexterity.

It's been around for much longer, so people have had a ton of time to optimize. Every really high level game feels balanced on a knife's edge. It's like chess, or a nadal-federer match. Clear openings, give and take, and you're waiting for the mistake or brilliant play that defines the match.

In SC2, we're seeing a huge variety of strategies still, and it's more common to win by choosing a strategy that just beats your opponent, a la paper rock sissors.

I'm not sure, SC2 doesn't have the same charm, too many flashy effects.

BTW, watch this: http://www.youtube.com/watch?v=ktzWQlR8D6Y