Why does it sometimes take so long for BuddyPress to publish status and comments?

I’m just curious if someone could help understand an observation I’ve had with BuddyPress. Why does it take several seconds sometimes, perhaps a many as 15, to publish a simple status update? It can even take this long for a comment. You click the button and around and around goes the little buffer wheel then finally the status is published. It’s not all of the time, mind you, but it’s enough to really make me think that something’s not right.

Why does Twitter publish status updates faster than lightning?

Any insight would be most appreciated.