Denver's offense has to be at the top of the league right now, even though they don't have a clear-cut #1 running back. Cutler is looking more legit and they have a dangerous receiving corps.
However, they have given up a lot of points on defense - 38 to San Diego (a game they should have lost) and 32 to New Orleans. The Raiders were a mess in week 1.
Had Hochuli made the right call in week 2, Denver & San Diego would be 2-1 and nobody would be talking about Denver just yet. The Bills, Titans, and *cough*Ravens*cough* would be the only unbeatens.