When it's to do with such young children I think people are cautious about saying yes. Partly because of the problems of definition. Partly because it's very hard to test young children. Partly because development in young children isn't nice and smooth. Partly because if they're not in the education system yet for the most part it's not really relevant. Unless they're playing concert halls at 5, doing quadratic equations at 2 etc
Also I think because lists of my toddler can do X, X and X are a bit meaningless. As parents we give lists of things "we" think are important or clever. Some things are easy to put a checkbox by and to compare. For example colours, shapes, letters, numbers, age they walked, number of words!
But I have a suspision that most of the things they do that really are clever, us poor parents havn't got a clue they're doing it. Or thinking it! I get excited when my young toddlers have started to recognize number, letter the odd word. But really if they can recognize that line drawing is a dog, why is it suddenly amazing if the can name a shape as a 7 or that is called a circle?
There there's the same child in the corner, dropping things, rolling objects about, putting things together, making up their little stories and we ignore it and moan that they're making banging noises again
Children with good early language skills are probably easier to make such lists for because you have "evidence" that they know things. Bit hard to know what they understand if they can't or won't tell you. Some young children really arn't interested in performing for parents
That's not sour grapes both my children when young have come out very well in the parental comparative list building.
So I'm sure not many are told of course your 2 year old is G&T but probably down to caution.