It depends so much for me.
When I do page where the characters talk and do nothing, it can take about 1-2 hours.
My most recent page are those that took me 1-2 hour to make.
However, when I do a page that have more the artistic touch, then it can take for me about 5 hours to make.
But one time, there is a page that made me take DAYS to complete. Not because it was difficult to draw (it was really simple pic), but what I did was such a dark and emotional scene, so it was just hard for me to sit and draw it. I had to something else just to make feel better. Now, I've finished that page, however, it's not out yet in Tapastic.