This may be slightly off topic, but a lot of the children in my dd's class (Y3) are over scheduled without any evidence of a particular talent. She attends a mainstream state school in a reasonably affluent area.
I completely support developing talent where it exists. I also support providing opportunities; My daughter swims once a week straight after school, learns an instrument (in school time but will probably go after school in September) and attends drama on a Saturday morning. These times work because they don't mean going out to a class at 7pm or late bedtimes or weekends taken up with activities.
I don't think she has a particular talent in any of these areas but I encourage her confidence at speaking in front of groups, ability to swim well and chance to learn the piano as I had no such opportunities.
Most of the other girls attend far more classes than this; ballet, judo, tap, kumon maths. As a result, they are virtually never available for actual 'play' or just 'hanging out' being kids.
Also, they go on holiday during every school break. Most of them are abroad right now, skiing, in the canaries or the USA.
I find it incredibly sad that these children, ferried about in big cars, spare time scheduled for them, will never know the pleasure of playing outside in the street, making dens, making mud pies, skipping with ropes and playing hopscotch, pushing dolls in prams ( have you tried to buy a dolls pram for a child over 7 these days? It's virtually impossible).
I also find it sad to see my daughter lonely during school holidays because everyone else is away. We are fortunate to have a week in Cornwall at whit and holiday to France in the summer but I don't feel the need to fill every school break with a trip abroad. I can't afford to anyway, but even if I could, I would much rather my children were tearing around the garden with their friends.
I know of at least one child in her class who's parents have disposed of her toys and bought her quite grown up things to replace them (hair dryer, perfume).
Another was almost prevented from attending my daughters birthday party because she had a tai Kwan do exam.
In my opinion, a child's brain needs to develop through play, exploration and adventure. I am encouraging this in my own children, I just find it so sad there are no other children in our area to share these pursuits with.