A trainer colleague who attended a recent training meeting said that The Talking Horse addressed the meeting and was fairly candid with regard to recruiting, stating that there is about 2000 on file of which around 300 are suitable for interview. Current success rates are around 1 in 6, leaving around 50 potential recruits.
I cannot vouch for these numbers as i only got them second hand, but they sound a bit more realistic than only 20 guys available for interview.
V