As said. Every family is unique .... or maybe your DS could have been even more brilliant if born first ...... ! We will never know, but we can all be sarcastic. Lets try not. All the data I know of, does suggest that it is single and first born children that are more often recognized as gifted - the key word being 'recognized'. This, of course, does not mean to say, that younger siblings are not as smart, but that in many case their intelligence is not as readily recognized and nurtured- even by their parents.