It matters...It shows how fast you can learn...The purpose of any training is to complete it in minimum time required,if you go solo in 20+ hours,than what the
have you been doing? Those who had 50 extra hours and are proud of their first time passes make me laugh...Once again,you don't need any kind of talent to go solo early,all you need is hard work...To achieve something you always need to sacrifice something...If you waste your time,trying to find out who else here is as useless as you are,instead of discussing the problem with your instructor or reading books that might help,or sitting in the a/c on the ground,etc. etc.,then I should admit that flight deck is not the best place for you.
Going solo early says far more about your age, your training frequency, your quality of instruction, your local airfield and the attitudes of your school and instructor than it says about your ability to learn fast.
And even then, an ability to learn quickly, is not a measure of your ulitmate capacity. Einstien didn't learn to speak until he was 3.