I logged in on Saturday and our HQ was hit. My wingman, Wiley, logged in and we spent the day defending the strats and the HQ. Not once did HQ get taken out again and we had many many try. We flew TA152's which I consider to be the finest interceptor in the game. We traded off landing and rearming so there was always at least one of us in position. Frankly, it was very fun and very exciting. In conclusion, yes, you can defend your HQ but you need patience, determination and a decent skill set.
Wiley has been a member of JG11 for a couple weeks now and I'm glad to have him, great guy, really good stick and fearless. Sometimes, he's even higher than me (when I'm taking off or landing).