Airplane refuelling, servicing...

How long do these take for (A) large aircraft (cargo planes, big passenger liners, etc.) and for things like fighter jets?

I'm presuming that with fighter jets, they're more like racecars than anything else, so refuelling them might be a matter of seconds -- big hose, high pressure, trained fast crew -- especially since they have the in-flight refuelling option, which I'd think **HAS** to be very, very fast or else you're in big trouble trying to keep everyone together... but it seems when I've watched them doing things with commercial jets that it takes some time to do the servicing.