The diving world defines anything beyond 130' as 'Technical Diving'. In addition overhead environments regardless of depth are also considered Technical (wreck penetration, caves) if there is no immediate access to the surface. This is not my opinion, this is how things are CURRENTLY defined by the organizations that try and set standards.
We can get as Zen as one likes and discuss what divers did in the 50's/60's, but we live in 2011, not in times past. Things have changed quite a bit even since the 70's and 80's. If you feel that depths greater than 130' are arbitrary and equipment like adequate air (doubles, or in excess of 80psi) is optional, that is your opinion. It's certainly not one recognized by any diving organization I am aware of. I guess there are some different rules in other parts of the world that I am unfamiliar with, but for such a global sport it's surprising how standardized things are.
I believe most divers draw hard lines when it comes to depth limits and defining recreational diving. That IMO is a good thing. It's not surprising that folks more comfortable with diving beyond rec voice their experience. It's interesting even if I am no stranger to that crowd.
I am enjoying this thread!