In our league (cambs & Hunts Prem) we've been using the top Tiflex ball for 2 (maybe 3) years now, and its bloody lovely.
Our sunday ball is pure dirt. about 15 league boards local to us haven't even had the good grace to meet with us to discuss us sponsoring and supplying balls to their league. A few have politely declined via email, often citing their members clubs happiness with the current ball. Which is total tosh, we asked everyone of our opponents last year what their thought of the sunday ball, same response every time, crap!
The assumption ive made is that most league boards are onto a really good thing in terms of income, and are unwilliwng to change things even when we offer a better ball at a cheaper price, and offer to sponsor their league too! Madness!