There was some cagey racing just prior to Arenberg which allowed the WVA/Ganna/Philipsen groups to catch back up before it detonated again on the trench.I think races never having a lull moment is hurting them. Either the strong teams are on the front and keeping the pace high, or the favourites are gone and everyone is pulling. No cagey racing whatsoever.
Alpecin never even used their numerical superiority today. Just pulling, pulling, attacking.