Air in Front of Articulation
Considering that last thought, perhaps it is a good idea to go to the extreme of putting the air in front of the tongue. I realize it's a strange concept, but for the sake of practice it is quite revealing. Try the following... Put your horn to your face and set your embouchure for a middle B flat. Take a deep breath and start the note with only your air. Once the note has spoken articulate the note with your tongue. Do it again. Only this time, try to make the articulation happen as close as possible to the air start. Continue moving in this direction until the air and the tongue are in perfect alignment. Hopefully, this method will help put an end to the air being too far behind the release of the tongue. I'd much rather err on the side of the air being too early than on the side of it being too late. Whenever I start having problems with getting immediate response, I remind myself of the articulated air start. I know it sounds like a contradiction, but you get the idea!