"SFIV tourney top-level shows this is not a factor. Execution is near-perfect and players get by with practiced tech / OS rather than making choices."
Execution is *near* perfect. Top level players don't miss much because they're top level players who spend countless hours practicing for the goal of being perfect. They still miss. And I'm sorry, but if you watched Evo top 8 last year or Capcom Cup and thought that players were getting by only with tech and OS, that's just being dishonest.