You are quite wrong, I'm afraid. In Jan 2011 Aer Lingus "most certainly" hired in at least 6 from Ryanair for several days. Here's a pic of one at CDG operating the EI529 to DUB.
You are quite correct, in this instance. I was thinking of Nov 2012, please accept my apologies.
I stand by my comments regarding the press and FR press releases however.