Wow, that's a really good idea. What I really like about it is that with so many rejected applicants per cycle, you can actually determine statistically the imp

Wow, that's a really good idea. What I really like about it is that with so many rejected applicants per cycle, you can actually determine statistically the impact of giving feedback on later performance. One can make a small investment of time to try it on a small batch, and if it improves the quality of the whole group, a financial case can be made to spend more time on it. One group of 500 rejected applicants is sent a sentence or two of feedback by a random YC alum (ideally whoever read the application initially, to account for each reader's biases) 1 month after their interview. Another group of 500 is set aside as the control, and is treated as normal. Is the group of 500 applicants with feedback more likely to reapply? Are they more likely to get an interview or get in the second time around?