I think this is a really nice idea, though haven't power meters been around signficantly longer than this?With so many riders dominating at a strikingly early age, I would posit one non-clinic-related explanation: power meters. They make the identification of talent much easier, and also speed the self-learning process. Before power meters it took years of experience to be able to find and "feel" one's limits, so even a talented rider would take longer to develop. It would be interesting to see a graph of UCI points plotted against rider age to see if the mean or distribution is actually changing over time, or if our perceptions are just being colored by a few notable outliers.
Or would it be that youngsters training with power meters and heart rates from a young age makes a huge difference?