I'm sure I must have said it about ds1 and dd, who are both bright. Ds1, I suspect in a pfb sort of 'he's very bright you know - very advanced for his age' - he IS bright, but not VERY advanced for his age now at 7 - just where you'd expect a bright boy to be.
Dd - I wrote an ESSAY on her for the school, because atm she seems RIDICULOUSLY bright, very verbal (and always has been), was finding reading/writing/maths easy BUT was August birthday, and tall, so along with all the 'seemingly very able' she was also 'only just 4' and liable to react like an only just turned 4 year old girl, whereas because in other areas she was very able, and tall, I was worried that they would be tougher on her (does that make sense?). She was fine, but did have a few 'moments' so I'm glad I told them all that.
Ds2 - he is the one where I am always telling people 'he's a bit on the slow side'. He's intelligent (I think) but didn't walk till he was 20 months ++, and at 2.5 is only just starting to talk - still individual words, occasionally puts 2 together. So I think he will be the one who is not 'advanced' for his age.