First off, Jackie, I did the Higdon Intermediate I last spring and on a couple of occasions had to skip a short run during the week. Didn't make a difference -- the key runs are the long runs and the pace-runs right before.
One question though -- it looks like you're running Mon, Tue, Wed, Thu, resting Fri, long-run Sat, resting on Sunday. Which Higdon plan are you using? This looks like week 8 of the Intermediate I schedule, but with the Thursday & Friday reversed. Is this something you did or are you on a different plan?
I liked having the Friday run before the Saturday long run as it did a good job of simulating the later miles of the marathon; instead of starting the long run fresh after a day of rest, I started it a little fatigued from the prior day's run.
Liked it well enough that I'm using the same program again and coincidentally am also on week 8 this week.
saviorfaire Personally, I do not think you are putting in enough mileage
Just curious as to the basis of this opinion? Assuming the Higdon plans, this sequence 4/7/4/7/15 suggests there's another ten weeks to go. What mileage should one be doing two and a half months before the marathon? Does one's goal for the marathon make a difference? Would someone aiming for 3:00 want to do more miles than someone aiming for 4:30?