We're still waiting for numbers from Google. They're apparently still working on the tools to generate the number of projects each organization will receive (tweaking variables/etc).
There's been some dire numbers being thrown around, such as 75% of the orgs receiving 5 or fewer projects, but the PSF should certainly be in the upper 25%. The lowest Soya app is now rated at #28.
Note, however, if the number PSF receives is very low - 30 or 35, a chaotic re-ordering is likely and anything is possible. I'm still betting on a higher number; it'd be entirely unfair for smaller orgs with 2-4 mentors to receive a roughly 1:1 student:mentor ratio while larger orgs to have fewer than half as many projects as mentors. We'd end up with a good number of mentors jaded from the time-consuming last few weeks not producing anything productive.