I must vehemently disagree.
Look how elaborate skill challenges have become in 4e. The chapter on building noncombat encounters in the DMG is 24 pages.
By contrast the chapter on building combat encounters is only 18 pages.
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Sorry, but the page count arguments I always find laughable. You say compare combat encounter pages to non-combat encounter pages - other folks have talked about page counts for COMBAT versus skills or some other facet in the Player's Handbook. It's weak because the bulk of the combat rules are in the PH, and it's weak because when they talk page counts 'for combat', they ignore the fact that almost all the powers and abilities in each class are combat related. So maybe there are only XX pages on the specifics of combat in a given book, but when I look at, for example, the Rogue class...the base class goes from page 116 to 126. Considering Utility items and such, it looks to me like this is about eight more pages "on combat".
I'm not suggesting that 4e is nothing but combat, only that attempting to measure the amount of material about combat by counting only those pages that are in a section labeled "Combat" is inaccurate.