When I first read the email I initially thought it was a great idea and I wished the August one would be on a computer... but the more I think about it, taking it on a computer sucks for everything except the essays. I will say that my essays would definitely be way better. I like to think as I write, and edit as I narrow things down. Not really possible while writing by hand. Plus typing would be a million times faster for me. But for everything else, computerized would be a pain. Like someone else mentioned, I HATE having to rewrite math problems on a piece of paper, but I really have to. I can't do it in my head. Same for any section where you cross off answers you immediately know or wrong, underline key words, etc. I think a lot of people (myself included) really like that type of interacting you get with your plain old pencil and paper exam. And I remember that on the Pearson practice exam the reading comprehension was such a pain because you had to keep scrolling down to a question, then up to the passage, then down to a question, and of course you couldn't underline anything or make any markings for yourself. Another big issue someone mentioned is skipping problems. For the PCAT I think for most people it's really vital that you skip around and do the ones you know you can do quickly first. On the pearson practice exams it is such a pain to click through and figure out which ones you skipped.
On a side note, that's absolutely ridiculous if the scores won't ever get mailed any sooner. But I'm assuming that is just for exams where there are some people taking them on a computer and some people taking them the old-fashion way. It would be unfair for some people to receive their scores weeks later just because there are no new testing centers available to them. I think eventually they will all be taken on a computer (like the MCAT, GRE, DAT, etc) and then hopefully you would get results much faster.