Children do finish up with different levels of academic ability, and early abilities in speech etc. probably do correlate with greater academic ability. But things do "even out" to the distribution curve where they will all finish up as time goes by.
My query is: does it matter? Is it worth introducing these concepts at an age when there are better things to capitalize on - insatiable curiosity, physical freedom, imagination, establishing loving relationships. These qualities are at their greatest when they are small and are precious beyond academic skills, which most will arrive at in their own good time.
Threads like these - though they might not have the intention - run the risk of making parents anxious that their child is not progressing in a healthy way - that their child is in some way "behind." And the risk of parents starting to prioritise one aspect of progress over others.
Just let the little ones be. Leave them in the happy unfettered world of their imaginations - they will be fed down a structured tunnel for the rest of their lives.