Here's an estimate:
Average reading speed: 200 wpm
Length of a submission: 12,000 words / 200 wpm = 60 minutes
Total number of Facebook confirmations: 51
Assuming 51 entries, that's 51 hours of reading. If one judge reads all the entries that's 6.375 business days of reading. Assuming likely 3 judges (Gabby, Jessica, and Michael) then it's going to be at least a week minimum. However Michael is 5 days behind on tipping so he probably won't judge right away.
Assuming that Jessica and Gabby start reading on the 8th, they will finish on 16th. Michael will probably not start until the 16th when Gabby and Jessica narrow it down to the top 10 or so. But with the podcast recorded on Thursdays, Michael probably won't read anything on the 16th. Maybe he will read all of them on the 17th and the 20th. So probably:
Winners will be announced on the 21st.
Total speculation though.