Average time to solo a student

On Sunday, June 3, 2018 at 11:43:58 PM UTC-4, wrote:
I'm a very experienced power pilot CFI & have soloed hundreds of airplane student pilots over the years. That said, I'm not as experienced as a CFIG.

I soloed a new student this weekend. He flew three solo flights & did a spectacular job. He has no former flying experience so he wasn't the typical add-on pilot that I'm usually teaching.

On line it appears in several places that the average time to solo a glider is around 40 flights. Is they information accurate? My student doesn't have nearly that many flights.

Opinions?

45 years training.
I soloed in 20 flights but there were gaps in my training based on my experience since then.
When asked today I tell people that students that of "average" aptitude, that fly regularly and do their home study, can expect to solo in between 25 and 35 flights. I have had one or two serious young people that were good enough at 20 flights but most come in around 30. This is aero tow.
I get crazy when I see students who have soloed at other sites and see maybe 3 or 4 flights with slow flight and stalls logged. The task has been covered but there is almost no reasonable expectation of proficiency.
A few extra pro solo flights with emphasis on slow flight, stalls, precision, and odd condition patterns is, in my experience, worth the time and money and leads to better progress after first solo.
FWIW
UH