I side gapped mine soon after I read about it here. The seat of the pants dyno didn't pick up any improvement but certainly no decrease in performance.

We all like to think of ourselves as rugged individualists. But when push comes to shove most of us are sheep who do what we are told. Worst of all, a lot of us become unpaid agents of whoever is controlling the agenda by enforcing the current dogma on the few rugged individualists who actually exist.