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Majority use http://www.squarespace.com if not that, then very similar templates.

There are a bunch of beautiful landing page/single page Wordpress templates specifically gear toward this stuff. http://themeforest.net has a bunch among many other places

CSS frameworks like Zurb Foundation's and Twitter Bootstrap are pretty popular now and make it tougher to make your site look ugly. I bet that has some influence.

Today is easier to get a beautiful template and customize it than building something ugly from scratch.