As Bravo73 said (and very well) - it doesn't mean a great deal in the scheme of things.
Some schools, for example, count first solo as a hover solo whereas my first solo was a couple of circuits of the airfield.
Time to solo? - around 35 hours. However, I completed the rest of the course in 20 - something hours.
My instructor wanted me to be able to do engine off landings, tail rotor control failure landings (which is outside the syllabus!!) before I went solo.
Whirlybird, I'm sure, will tell you her story. The military guys will tell you another.
So it seems the average could be anything from 5 to 50!!
Cheers
Whirlygig