Sunflowersmile - it was my experience - perhaps not the right word .... but I would call "its all right for you, your DD can already do x" said in a not particularly nice tone of voice bordering on jealousy. But there were alot of pushy / competitive parents in my area - and then the nursery (pre-reception) started phonics and early readers - and my DD was the only non-autumn b'day child to be taking part. So I then I got a bit of my DD can do x, can yours as well. Or she must be a September b'day, that's why she's doing so well - sorry no she's July. By the end I did get sympathy off another Mum, so it wasn't just my imagination. DD had finished all the early years framework tick boxes by the January of pre-reception - and in my stupidity it hadn't occurred to me to stop someone else looking at the sheet, as I didn't think DD was remotely unusual. 
I've always told DD that to be good at something you have to practice, but you will find things you are naturally good at or enjoy, which makes it easy / fun to do the practice. Mozart was a genuis, but I've read that all those super talented people would have spent at least 10,000 hours in pursuit of that talent. They loved it and were interested enough in it to 'practice' and devote hours a day to what they chose to do. Or read what Judy Murray did with her sons to turn them into sportsmen from 18mths old!
But I remember friends who however hard they practised could not remember something which to me seemed simple (eg mon, ma, mes, ton, ta, tes, son, sa, ses in french). And one tried until she was literally in tears. Its all about finding your child's talents and helping them develop those so they can be confident. But curiousmind - no I don't think everyone can succeed at everything just by hard work.
Also rabbitstew I think that there were less tests at school in Einstein's day, so perhaps it allowed him to branch out more? I am interested in how to help my daughter develop her enquiring mind whilst retaining my sanity! And I'd prefer a good all-rounder to one that has me tearing my hair out, so I have a tendency to suppress her a bit!