About theory trainings - Polish CAO (called ULC) published recently interesting documents at their web page -
Urz?d Lotnictwa Cywilnego - Statystyki Komisji Egzaminacyjnej - you can check how students of all schools passed their exams (in 2012).
Just to sum up for those that don't have too much time - a comparison of Bartolini Air (the only other FTO in Poland that flies TECNAM P2006T) and Ventum Air based on the ATPL theory results:
Bartolini Air - ATPL average score: 85,29%, successful attempts 55/61 = 90,16% (meaning 9 out of 10 attempts are successful)
Ventum Air - ATPL average score: 81,81%, successful attempts 216/286 = 75,52% (meaning 7.5 out of 10 attempts are successful)
You can easily see who goes for quality and who goes for quantity.