This isn't official policy, but you might notice the fp of Oppo looks a little wonkier than the FP of Jalopnik or other Gawker sites. Here's what they're doing to make it look "better" most of the time.
I'm cribbing from Jesus and Sploid, who figured it out first. Basically, we narrowed the topshots a little bit to 2.21:1 as opposed to 16:9 and we have more embiggened top shots (making the top shot big).
The image you choose for the topshot is up to you, and anyone who is an admin can embiggen a topshot by "recommending" an image in it by clicking the little start that you get on an image when you hover over it.
It's your page, so do with it what you wish, but this is a little FYI.