I got a tiny nibble from an agent who, sadly, doesn't handle YA, but it was encouraging, as was the nice feedback some of the other writers on my Twitter feed posted.
When the dust settled, I'd posted 3 micro-pitches. My personal favorite was the 3rd one, which I think I posted about 10 minutes before the event ended.
Here's what I managed to come up with.
Dwarf teen, Grace, is more than a mark on a measuring stick. Convincing others, including the local farm boy, proves difficult
Dwarf performer, Grace, finds convincing people, she's a person and not a doll an overwhelming challenge.
Being a 4’ teen dwarf is tough. Teaching magic to a pig, tougher yet. Hiding her feelings for the local farm boy ... impossible.