With the occasional exception, I find that the limited number of episodes in British TV shows limits the exploration of characters. I tend to find that characters, especially in comedies, are little beyond caricatures, and the jokes are usually just jokes. This works really well for some things, like Fawlty Towers, and is a detriment to others, like Coupling.

So, no, quantity does not equal quality, but sometimes you need a decent amount of something to tell. You don't drink 5 mL of wine.