Some great questions this week - thanks!
While this routine is technically Mike Smith's routine (it's from Building a Better Runner Vol.1) I think he'd say that slow bicycle vs. fast bicycle, up to you, but the key it that you're doing work. Specifically, you're doing more non-running work to improve your work capacity to you can either run more miles or run those miles harder. And I think tha leads into hillcruiser's question - you simply want to do a lot of GS (to failure? up to you) following yoru hard days and on your easy days you simply want to do 5-10 minutes of work, though you might eventually build up to the point where you can do 15 minutes of work following all of your easy/maint. days.
Mahogany, Teack and Dryer (all from Vol.1) are all good routines and all fairly similar in their level of difficulty. Basically, the first month or two they will be challenging and you should do these after your hard days, but eventually you'll get to the point where you can do these after your easy days, plus something like Myrtle or even 4-6 minutes of Pedestal (just the holds, not the leg lifts).
Thanks for the questions!