Interesting article

K.O. SWINGER said

I have no concerns about what I feel are insignificant timing events changes in the low load. if your road racing or circle track racing it may be an option but for a street /strip nope .if you have nothing more to spend money on than buy a gear drive. But a belt drive would be the direction I would move if I really felt the need to. To each their own!

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What I don't have money to spend on is bent valves and a broken motor.
My very first car some 40 years ago(Honda civic) ruined the motor when the factory timing "belt" broke and the Pistons hit some of the valves in the process. I would say a chain is more reliable, for a street strip car, but with my high lift cam, I need to know that my piston to valve clearance stays where I set it at. A gear drive is best at that. IMHO