Digital is cleaner, and in most cases faster to produce, assuming a full size keyboard and not some crappy phone "keyboard". Takes me like 20 minutes just to type an email address on my phone, can't imagine taking notes on one!
Cleaner? How is taking notes dirty? I've never had to shower after taking a page of notes. I type around 90-95 WPM with 90%+ accuracy and there's no way that's faster than physically writing notes. Of course, my handwriting really isn't readable to anyone but me.
