My apologies if I shouldn't really be here, I've never posted on G+T before (in fact only recently found out what it stands for I guess I'm not the G+T 1!)
Anyway. Ds is 22mo. He has been able to recognise all the letters of the alphabet for about a month - the first time we saw that he recognises letters was at about 19mo - he pointed out the letter "e" wherever he saw it! He can find any letter you ask him to, in alphabetical order, on a keyboard, or in a word. He sits at the keyboard and points out and names most of the letters (apart from ones whose sound he can't say yet). He can point to a word you ask for (sometimes needing a prompt like "it starts with s" or similar). He recognises number 1-10, knows that 3 comes after 2, 4comes after 3, and 9 ocmes after 8.
Also he understands everything we tell/ask him.
Is this advanced for his age? He's my only child so nothing to go by, no children similar age in the family close by to compare with.