It's less dirty.
Announcers seem to think Froome has it won.
These multi mountain stages give climbers a huge chance to make up 2 minutes in one day. They can sometimes make up 2 minutes on just the last climb alone.
Yes, Froome is a great climber, but all climbers can have bad days, and it takes only one bad day to be 3 minutes back.
Contador is mid 2 minutes back, as is other climbers.