As a horde player it does seem like this is the case. I pop into Ashran every so often for nemesis quest and in hopes that horde is trying to win but there is usually a full raid group just floating around doing the side objectives making it impossible to overcome the Alliance zerg in the main push. Personally I hope they add some kind of benefit to the main push for side events. Maybe then will players go from side events to main push instead of rotating side events all day.