Where on Broadway? There are several towers towards the river that have not been upgraded at this point. This is most likely due to restricted access by the owner of the property not allowing the work to be completed. With 65, it depends on which direction you were traveling, time of day, etc....
Also, there is heavy use with all of the new developments around downtown. I see some slow speeds during the middle of the day and I have a tower 300 yards away.
I wish I could say more. If you want to know more, please look into becoming a premier sponsor. You will have much more information at your disposal.