You mention the, "pretty wide tipped, stubby looking wings".

Longer span slows the roll rate. Look at all the hershey bar wing models like the Tiger series. They've got all that span for a couple of reasons. The easiest way to get them a quicker roll rate and at least a chance of being able to snap is to cut the span a bay or two each side.

So the model you mention got the "pretty wide tips" to slow the snapping tendency and the "stubby" is there to keep the roll rate high.