lost me a bit there. Either you're contradicting yourself, misunderstanding the conversation, or I'm reading you wrong.
I think everyone with an S5 wants to mount their computer as parallel to the ground as possible, in the way pros do. No-one is looking for a mount that sticks out in the air in front.
We can't do that with the S5 bars. That's the issue. The barfly definitely does not come anywhere close to this position. The Barfly is probably worse aerodynamically that just strapping the Q mount to the front edge of your Cervelo aero bars. As a couple of us are doing at present. I just sold my Barfly this morning.
The one in this photo looks fine. The one mounted into the top holes on the stem in various photos is a drag chute. Then there is the HTFU one... the photo angle may be deceiving me but that extremely long, flat mount looks like it's angled up, which is criminal.... Really of the options pictured in the thread, only the one in your photo is a faster, cleaner setup.