This may be a Cat. 2 climb, but it is by no means a Cat. 2 descent. They are going to be descending 1323m over the course of 38.5km all the way down to Bourg-d'Oisans, which is the town that lies at the bottom of the climb up l'Alpe D'Huez.
Good point, BaBa. Tho it doesn't appear as steep as the 1st descent, it's certainly much longer.
Was just talking about your comment w/ a friend,he looked it up & said that Col de Lauteret, while a Cat 2 in this direction, was a Cat 1 the opposite way - see Stage 9, 2003 Tour.