Can't promise I'll notice something that shouldn't have been overlooked, as I have a problem with that myself. I'll take a look later.
From my perspective, since I'm not actually really good with web coding and design, I'll just say yes. Each given page contains an array of small, separate elements, and it can be overwhelming if you're not sure where to start. (That's the main problem for me. If I were given exact guidance to change a, b, c and make x, y, z, I might find it easier.) The amount of work is pretty high. The individual elements, though, are pretty easy to make if you know some Photoshop basics.
For the experienced web designer, I'd wager it's not really hard as they're already given a framework within which to work and thus don't have to fuss over ideas too much, making them able to focus better. That doesn't mean the amount of work that needs to be done gets any lighter, though.