I think it all depends on the individual... Honestly, some over think parenting.... and OVER structure their kid's day.... I had my son when I was 37. Therefore, I guess I am considered an older mom :) That said, I don't think it's my age that makes me a better mom or not... but rather my life experience.. I have learned early on and am still learning... :):) that you can't sweat the small stuff and must choose your battles....
I do think there is something to be said about experience, but I also tend to think experience or not, it's also about the individual... Our babysitter was in her early 20s when she watched our son and WOW!!! she did a great job... what do I mean by that.. she LOVED our son so much and it showed... Does he remember going to the park with her, sure... somewhat.. but know what he most remembers... HER KINDNESS...
at a young age, kids just want love and acceptance.. I do believe in academics in that my son who is now 11 goes to three hours of Summer School (for which he loves) and has two academic classes and a third Chess... However, the rest of the day is spent doing whatever...
So to answer your question... YES.. I think younger moms are quite capable... but so are some older.. It really depends upon the person.. I've been on field trips with my son's class and been with younger moms/dads who aren't very active with the kids and I have been the one chasing the kids down trying to get them across the streets safely while the other parents texts and talk on their cellphones.. However, again, it's about the individual.. Have also known more experienced moms whom despite having had many kids really don't parent too well..
There's a saying in my 12 step program.... "what others think of me is none of my business"..
Try and not worry how other moms view you... The result of your good parenting (or not) will result in your child... Are they well adjusted , compassionate, well mannered and can think for themselves? if so, then I'd say that is probably a result of good parenting...
Consider this. in the same way a younger mom might wonder what an older mom thinks about them... I can tell you as an older mom... I have had moments when I too have wondered what a younger mom thought of me...
Lastly, long before play dates, birthing classes..... "mapped time" little Einstein Programs and all this other hoopla about how to raise a child came out.. parents were raising kids.... Try and not let other people's opinions matter too much... You are probably doing just fine..