Sly,
Jennifer averaged almost exactly 3.0 miles per hour from her starting time to ending time each day. 15-16.5 hours to do 45-50 miles. If you figure in the short breaks she took after sections of trail, she probably hiked 3.2 miles per hour on a consistent basis. And she was CONSISTENT. I would assume that the dry weather was a factor in keeping her spirits real high, reducing greatly any blister issues, and not forcing her to endure slower hiking and longer hours to get in the desired mileage.
http://www.jenniferpharrdavis.tumblr.com has the start and end times each day.