FB: Hilos Camera Repair
As what many have commented, it is the pictures that matters. Then again, there is Photoshop (although there is only so much you can PS).
From a businessman/photographer angle, you only need to convince your clients. They are the ones who pay for your gears anyway. I have seen someone who is using a 10D and still have clients lining up his freetime schedules for their wedding shots.
From a personal perspective, once you hold a DSLR, the general viewpoint from friends or relatives is that the pictures must come out nice. The more expensive it looks, the better the pictures. Sometimes, I just bring my camera out. Shoot only when needed/required. You shoot for your own keeping/sharing. You determine the kind of photos you want to keep.
So, it is the perception of the individual holding the camera that decides how others can affect him. Same like a camera, you aim, focus on the subject, then you shoot.
it's true, sometimes people ask what camera model you are using just to start up a conversation. same like what lenses you using, what you normally shoot, etc.
for people who judge others based on camera models, just ignore them. as long as you are happy with your camera and it does what you want it to do, then that's all that matters. in fact choose equipments that work for you rather than what may look good to other people