"I have written 'true' OO C, now it is clear that C has no OO support within it. I have however implemented polymorphism (of sorts) inheritence (of sorts)."

"(of sorts)" says it all. A language supports OO programming precisely to the extent that each programmer doesn't have to hack his/her own half assed version of an OO feature, be it polymorphism, encapsulation, multi-methods, etc.

After all, any Turing complete language can be made to do _anything_ that can be done with computers. Some languages just make it a whole lot easier to program in a certain way. If you wan't to program in a truly OO way, then languages built with OO in mind from the start make your life a whole lot easier than those that had OO bolted on later.

This is not to say that OO is the one true way. But if you _do_ want to program in an OO manner, your time is much better spent using Smalltalk, or Dylan, (to name a couple of languages with OO support from the ground up) than, say, C++ (to name a popular OO retrofit).