Oh yes!, Spirit will be in the lead for quite some time. But don't count Opportunity out yet. When she gets going, there is NOTHING in the way.
100 meters per day should be very easy.
Gustav Crater could just be so old that the everything is covered up with sand and dust. I was so disapointed with the Bonneville crater, but when
you look at it, it looks millions of years old ... not fresh! Maybe Spirit will get lucky yet. I was fun to watch the climb to the rim though!