I agree with your MCHN, and ausgirl he is good at other areas - not everyone will be great at everything. For example my DD is not great at stacking blocks - it doesn't interest her in the slightest - that is one of the things they did at the MCHN 3.5 year appointment - the nurse wanted her to put them one on top of the other she just kept saying "no it is better this way and stacking them 2x2 instead of 1x1 - the nurse asked if she stacked at home - no she doesn't has never been interested in that sort of thing. Counting isn't particularly her strong point either - she missed out 7 when MCHN asked her but she is interested in what does 2+1 make and 3+2 etc. She also knows all the colors and has for about a year - the 3.5 check only wanted them to know a couple. Asked to count as in saying out the sequence she quite often will get it wrong - but strangely enough you ask her to actually count objects and she does far better. Sequences probably aren't her thing either - but she does remember all the words to songs and stories after only hearing two or three times - I think is down to where there interests lie alot - she is very into words and sounds but numbers don't grab her at the moment.