Took a grav reading tonight, and drank the sample - this is going to be a very enjoyable brew!
The Sorachi is WAAAAYYYY more lemony than I expected. The agave nectar appears to be a no-show, though I'm sure it's doing its part to lighten the body. Tastes like it was brewed with lemon peel - the aroma speaks of lemon, but the flavor screams it. In a good way.
I'm thinking I'll go a little high on the carbonation. Glad I documented this, because I'll have to have another go at it later in the year - could be a really nice summer brew.
Sorachi Ace may not be all that useful in a lot of beers, but I'm thinking it's going to become a favorite in its own way.