Well first of all i hope Schwenkgott isn't right when he says "Schwenkgott says that Straywood aviary would never win a tournament with good players" just because that would mean Beastmaster (swarm) is more or less broken.
If you look at the thread about this particular win last year, you will see several of the more experienced Mage Wars players on OCTGN that seem genuinely surprised that the book won. I am not sure about the number of games the players that participate in the tournaments have put in, I am sure there are players that IRL have gotten in a good number of games. The most advanced players on OCTGN like juli, Charmyna, Schwenkgott, and even the OP have at least 100 games in and that is only since the game started tracking these stats the middle of last year. I know I have played at least 50 games myself against Charmyna! With that said, they have seen many strategies, spellbooks, and stratagems based off of spellbooks.
That said I would "never" choose a Beastmaster because I think he has problems vs. some mages and in a tourney I would want a mage that can do well vs. everyone.
Just like football, on any given day any given team can beat any other given team even the one that is 1 and 14 vs. the one that is 14 and 1. As this book has proved, with the right player, right timing, plenty of games to test the book leading up to the tourney, to hone, tune, and develop responses to other books makes it a winner more than just a book itself (i.e. player skill and experience with the book in question).
Then again a player like Charmyna seemed to do what he wanted with Watergate Wizard, Wizzly Grizard and Banking Blaster - even playing vs. the same opponents more than a few times a presume.
Much to my frustration and chagrin, this is very true, I was the victim of most of the books Charmyna has posted as he was developing them. WizGriz and WaterGate being the most painful of the two. I tried and tried to poke holes in his books and very rarely (I am not one of the great players, but I like to think that I have played enough to know what a really good one would look like.) even came close to winning.
This is not intended as a "I hate you Schwenkgott post". I'm here on the forums to learn and hopefully become a better player.
I honestly do not believe this was intended to be a flame or demean the book in any manner. Talking with him, he believes there are multiple simple counters available to all players and mages that would make a game very difficult for the Aviary to win if the book playing against it were prepared for it with a couple of these simple counters.
The back story behind this book and its great win, was no one was prepared for it or practiced counters to it leading up to the tourney. If any of you guys play on OCTGN, grab the Aviary spellbook and practice with it for a couple of games. Once you know how it ticks and have it tuned to your play style. Take a run at juli, Schwenkgott, or Charmyna (don't telegraph) with the book and let everyone here know how it went and what you thoughts are. There is nothing better than experience to gain insight on how and why another player says and plays the way he or she does.