My pvt doesnt count, as it was an add on to my fixed wing licence.
Did it with appox 37 hours.
The question of average time always bothers me, as it sets up the student into comparing him/her self to an imaginary standard.
Unfortunately we do have the minimums for the ratings as just that, so my answer to (future) students will be to ourtline the minimums, but point out that other factors already outlined here will determine how long it will take them.
If pressed, I agree with 60-70 hours as a general range to give out.
Here's a question on the same topic, how long will you go with a student whom you just know is not going to be able to fly to standards? IE, will likely not solo, let alone go to the checkride.
I have seen such a situation here, wanted input from others, but can say that no one here blindly after a period just kept taking that students $$$, etc. Choices were offered.