Your assertion seems inaccurate to me. Let us follow the thread backwards to this point:
https://bitcointalk.org/index.php?topic=4985868.msg53112807#msg53112807hv_ spake thusly:
My advice: Look into the Version 0.1
Set in Stone.
No - there is no Change needed that enables anything new here in protocol level
Note the use of _protocol_.
To which BitcoinFX replied:
Quite clearly talking about _implementation_.
So you're implying that 0.1 isn't an implementation of the protocol but 0.2 and 0.3 are?