A 12 week mentorship is generally considered to be better than a shorter mentorship when it comes to critiquing student animations.
 
A 12 week mentorship allows for more in-depth critique and feedback. With a longer duration, there is more time for the mentor to review and provide detailed feedback on students' animations. This can be especially helpful for students who are looking to improve their skills and techniques, as they have more opportunities to receive guidance and direction.
 
Finally, a 12 week mentorship may be more sustainable and enjoyable for students. With a longer duration, there is more time for students to integrate new concepts and skills into their daily routine, which can make the learning process more enjoyable.
 
Overall, a 12 week mentorship provides a more comprehensive and in-depth learning experience for students, particularly when it comes to critiquing and improving their animations. It may be an optimal choice for those who are looking to take their skills to the next level and are committed to putting in the time and effort to achieve their goals.