Cobral led in the Olympic Heats led & advanced because of it.
Many of Ryan Hall's best races had him pushing the pace. You wanted him to sit on Ritz at the '08 trials, because leading "too much work"?
Arguably U.S.'s best race in history - Joan Benoit Olympic Marathon - had her lead from mile 2.
Lagat running 80's counts - though not pushing the pace part, but plain leading. Often I said leading lets you control your ideal pace - He did that.
Webb's a 3X Nat'l Champion, because he led much of races & forced others to be fitter than they were.
Bob Kennedy, Todd Williams made a USATF Championships living by leading.
Gabe's best moment was jumping into the lead early.
Ritz in last year's 10,000M.