Check out one of the most successful travel blogs on Steemit, by @sweetsssj. Her posts are not fairly long, but content-rich and content-nutritious.
And from my discussions with other Steemians over the past few months, it's clear that short, simple posts are not looked upon too favorably. And rightly so.
I believe the powers-that-be at Steemit are looking to fill the site with as much quality content as possible. That way, Steemit willl not only set itself apart from the likes of Facebook and twitter, but actually produce a site of true value.
Let's all work together towards that ideal.