I make them with Photoshop and I pick a picture that I'd like to make a typography of and then put words on it. I pick what font I like, convert it to a shape and then warp it around the general shape that I choose. For this one it didn't take that long to complete it so I'd say an hour and a bit. For other ones usually it takes about 4 hours or more.
Very cool! I wondered how long something like this might take with so many individual shapes and text to size. ~4 hours or so doesn't sound too outrageous. I've been wanting to experiment with images made up of text for a while so I figured I'd just ask someone who'd done it and done it very well. I can't wait to see more of these from you!