I can type on my iTouch as fast as most people type on a computer (which is faster than most people write) so I'll be surprised if i cant do the same on an iPad. Get a stylus for your iPad (yeah it's a little annoying it isn't included but whatever) and draw diagrams and stuff and you're probably set. If you just can't type by muscle memory without having a touch keyboard then maybe add a bluetooth keyboard. Add in the ability to record the audio and you can probably get some pretty good notes. I don't buy the handwriting being better for memory. It's probably just whatever you're used to. I always type my notes on my laptop and I find it less distracting than writing. The diagram thing is a point but having a screen you can draw on would take care of it.
Yeah but can you type with the same amount of accuracy as someone on a computer while looking at the board? I find that highly unlikely.