Personally, I look at it as different balances on BSing around/hanging out vs focusing on story.
In-person games are usually BSing >>>> story
Live remote games seem to keep them fairly even, though I only have like a sample size of 1 personally. I would imagine voice-based games lean a bit more towards the BSing around, and text-only games lean a bit more towards story, given you can type up fabulous descriptions of what you're doing much easier and in less time.
PbP games are story >>> BSing, given the time differences and advantages of being able to indulge in proper purple prose, though it's not totally absent given OOC threads.