Also, the Trial of Position really doesn't reflect upon training or assignment in mech class. They aren't putting you in a light mech for your ToP to further your education.
The idea is, whether or not to make you a warrior, and if so, of what rank. Sibko training prior to that, and unit training after, instills in you whatever you need to know to pilot your assigned mech, whatever class it may be.
Personally I've always felt like the Clan Wolf ToP was designed to make it a little easier. Since you are driving an assault mech, you should have enough padding (armor) and firepower, to make a few mistakes and still win against your first opponent. But unless you truly mop the floor with him, you'll take some damage in the process, if you take a lot of damage in that first fight, and your second opponent has an easier time taking you down.
That doesn't mean Clan Wolf warriors are less skilled. Personally I think it means they put less emphasis on their Trial of Position as the evaluation of a cadet's abilities. I suspect Clan Wolf sibko training is pretty tough, and if you make it to the ToP stage, it's because the Instructors have signed off on you and declared that you have the guts and ability to be a Clan warrior in the eyes of the Clan (if they don't think you'll survive a ToP, you get relegated to a lower caste). The ToP is proof positive, but also the end-chapter of one part of your life. After that, you step into the role of a warrior and you still have to prove yourself and improve your abilities. If you don't, you end up in a secondline unit on the slide down early in your career.
All of the above about Clan Wolf putting less emphasis on the ToP is just my opinion, not stated in any canon source. I just offer another perspective to look at it.