Thanks for the great info guys!
On camshafts I've always understood (right or wrong) that one of the lubrication "problems" is that they only turn 1/2 engine speed. The idea being it takes a certain amount speed to surf on the oil. Aprox 1000 rpm is what Crane cams advised me many years ago. That means the engine needs to be turning 2000 rpm, any less and the AW add in the oil really comes into play. Of course oil viscosity, valve spring tension, valve lift acceleration etc probably comes into play on the actaul rpm. This was the reasoning for new cam prelube and the bottle of oil suppliment they sent out with there cams (looked like moly?). Also the advise to start a new motor and get it above 2000, don't let it idle.
When overdrive autos became common in V8 autos cruising under 2000rpms for long times was normal. Cam profiles that allow the use of real light valve springs with slow opening and closing ramps were developed to slow cam wear. These cams were not exactly what you'd call performance grinds. One way the oems' have got around this is the use of roller lifters.