I did the etape this summer and planned my nutrition on bananas and gels. It was 10 hrs from beginning to end. I quickly got to hate the gels and found they made me feel queasy. I had used them for shorter events (up to 5 hrs) before, but I would not use them again for a long one.
I still don't use too many though, quite often on a 50 mile club ride I'll not have one, or just one, whilst some other riders will have 3 or 4 during the ride 
