My son has just started school, just turned 5, he is the only one in his class that can count into the hundreds and beyond , for example if you wrote down 432 he would say 4 hundred and 32 not 4.3.2, he is obsessed with numbers and letters, he recognises and remembers peoples house numbers after only seeing it once and can tell who lives there, we went on holiday last year on two seperate occasions stayed at two caravans and he can still remember the numbers, he has speech and language therapy which has now been advanced because his communication and langage is of a three year old, he also knows his 2, 5 10, and 11 times tables already, what is feelings to this or diagnosis?