When reading this post my eye noticed this and my mind wondered :
The boat tacks extremely well
...
The bottom line is it takes a lot of practice.
Wouter
Every A-Cat I have owned has tacked faster than the other boats I have sailed (P-19, Tornado, F-18HT). It takes practice to get across the boat quick enough to keep from flipping over (especially on my A2). It also takes practice (a lot) to perfect the basic choreography of a great wire-to-wire tack (and that applies to any trapeze boat). That is one nice thing about the A-boat, you can really take advantage of smaller shifts upwind because it does tack so easily.
It's amazing in a race how much you can lose with a bad tack. Practice is key if you want to win a championship.