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Not necessarily. Although the laws of supply and demand will still be at work, although the supply has become greater, the demand has remained the same, and people will always need stuff.
So the way I look at it, the value of an apostles rare or ultra rare to the average player dropped by over half when TexP came out.
I'm still waiting for SirNobody's Half-Price Sale thread....
I think another thing to consider is that as people obtain more of the Apostles URs you find in many decks, (Writ, GoyS, WoP, Shroud) they are building more decks, not necessarily trading or selling those cards thus the supply isn't increasing quite as much.