Long day training

At the end of yesterday's post, I pondered a question about how to space out your long days when training for an Ironman. Below is the excerpt:

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Parting Thoughts About Long Days
I've seen two schools of thought on long days of training for Ironman triathlons:

One method has you doing your long ride and long run days back to back on the weekend. I think the theory is that you can prefatigue your legs on Saturday with a long ride followed by a short run, and then you do your long run on Sunday with tired legs. This would simulate how your legs would feel in an actual Ironman triathlon. (Huddle/Frey)

The other method spreads out your long run, long ride, and long swim with days in between. Like, long run on Wednesday, long swim on Friday, and long ride on Sunday. This way you can have an optimum workout in each activity without a lot of accumulated fatigue (besides the shorter faster stuff done the rest of the week days). (Gordo/Friel)

Which method works best? I've passed this question along to a coaching expert, Shawn Burke at Velocity Multisport. Shawn has done a bunch of Ironman and 1/2 Ironman races, and has done a lot of coaching...so he's one of the main guys I go to for triathlon questions. I'll post what he thinks when I hear back from him.
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After speaking with Shawn, he feels that long ride Saturday (+short run) followed by a long run on Sunday is the way to go. This will prefatigue your legs for Sunday's run, which will more closely simulate what race day will actually be like. He said that he has tried both methods mentioned above, and thinks this works best. He also had some other good workouts that he uses to help his clients achieve their Ironman goals...but I'll let you ask him about those.

Thanks to Shawn Burke at Velocity Multisport for the info.

Sween