Dear Dilip,
Wonderful presentation! Thank you!
But, my 2 bobs worth is that whilst Ability doesn't have that much to do with Success, it is very closely linked to Success in 1 Fundamental Manner. And, that manner is that:
Each Successful Person Always Possesses the Ability to be Persistent, Perseverent, and Disciplined!
So, yes, in this way, Ability plays a critical role in each individual's success - but like all things associated with True Success, it is NEVER overtly visible!
Once again, thank you for the presentation!