In reply to elliot.baker:
Hi Elliot,
Here's an attempt to answer some of your questions, based on back when I last did it.
1. My suggestion here is to go with what you know, and if the North Ridge works for you, that's what's best. Funnily enough when I did it I decided to do it the way you've described Finlay doing it, as that's what Colin Donnelly did, but I remember my line being quite inefficient, as I hadn't recceyed it (rookie error...). Maybe it's quicker if you have, but if you haven't I'd say to avoid.
2. I ran down the road, and I suspect that's what others do too, although there is a much better path up/down The Pass than there was back when I did it. Maybe someone else can provide you with more up to date info?
3. It's pretty easy to find, insofar as it's the first major gully you come to. It's initially pretty steep/scrambly/unrunnable, but soon opens out into a series of stone pitched steps (which are very obvious).
4. That way up Pen yr Ole Wen is indeed a slog, but (weirdly) it's one I've always enjoyed. The path - much like you say - starts just after the bridge/river and is pretty obvious. After that it's best just to switch your brain off and follow the obvious line. Once you're on top of the Carneddau it all becomes much more runnable again (which may or may not turn out to be a good thing).
Only other piece of advice I have, which is a mistake I made (but sounds like you've got covered) is to take it easy on your way up Snowdon. I ran up from Llanberis, which is where I was living at the time, but in doing so added a whole hour of ascent into my legs before the stopwatch had even started. Retrospectively this was a foolish decision...
Good luck (and have fun)!!