You'll hear back on April 7, either way. If you get a question on your app, that means they're atleast mildly interested, but it could still go either way. It's all very opaque and for a good reason: Once you submit the app, go back to building your product/company, don't worry about the result. Since you're going to do your startup ANYWAY, right!?!
On April 7, we'll invite the groups that seem most promising to meet us in Mountain View during April 23-28. We'll reimburse up to $600 per group for travel expenses[1]