I have just finished my Rn to Bsc via Athabasca. You can do it as quickly as you like (or humanly can). My initial plan was to whip through it in a year, but with my tendency to procrastinate for 5 out of 6 contract months and then do all the work at the end - well it took about 2.5-3 years. That is not working fast and having long periods of doing nothing :-) I've found the marking very easy, and despite the "boring" course names and descriptions, I did manage to get into it - and enjoyed most of the assignments... Good luck :-)