OK, seriously then.

A new Dovo from the factory usually takes me around a 1/2 hour up to 45 minutes from go to whoa (bevel to finisher). I've done so many of these now that I just know what is needed and it's relatively quick as a consequence.

Vintage razors can take anywhere up to 5 hours all up, maybe more, though I've never really timed those kind of resto honings - that's just a guesstimate. It depends on a lot of things like the grind, the edge condition etc.

Probably more important than the time it takes though is just to make sure what you are doing is working. From that point of view honing is timeless. For certain things (like factory Dovos) practice brings the time down eventually. For others, experience helps but each razor needs to be taken on its own merits. In the end what you want is a good edge - it doesn't matter if it takes a 1/2 hour or 20 hours (though I suppose if you want to hone for money it may effect your bottom line if you continually take days to hone a razor...)

James.