Age is a perfectly meaningless metric. Experience is necessary, but what experience actually buys you depends upon your passion, adaptability, dilligence, and taste for novelty. These are the amplifiers of experience that determine actual ability. There are people in this field for whom three years of experience yields spectacular talent, and others for whom decades of experience does nothing but render them sclerotic and dated.
I'm quite young as far as things go, only 23 and a year out of undergrad, and typically dress in street clothes for business activities, nothing overly tacky, but certainly not a suit. I enjoy sitting back and letting other people develop their own, uninformed opinions, and subsequently turning them on their heads, much to their chagrin. It shakes their categories up for sure, but I think it does them some good. T'will make them think twice in the future about getting too carried away with their unfounded postulations.