Quinze
Reading your initial post where your friends have ridden along and cannot believe you have soloed yet I think in your position I would be shouting and screaming for an explanation.
Flying is a very expensive business and it is your money that is being blead away not your flying clubs!
I soloed at 8 hrs probably too early, an organisational mistake and many moons ago. How I made it round only God knows
There will be plenty here who will publish their earliest solo hours record.
There will be plenty who will claim that you will solo in good time when you are ready and thats it unimportant.
I knew one guy who didnt solo till 60 plus hours but he was a pensioner quite happy to trundle along with an instructor.
For a fit reasonably young person anything over 20 hours and something is going wrong.
Either you are being ripped off or you have jumped from one instructor/club to another or the weather has been crap.
If its a flying problem then its your instructors duty to safeguard your money, identify the problem early and sort it.
SHOUT!!!!
Pace