Lancelot smiles, not so much surprised as pleased that Magnus is actually thinking through this. "Yes, some of the time. It is true that the robes make it more difficult for one used to either clothing like this," plucking at his own shirt, "or armor. But also, his sword is different and thus the techniques differ. I am not well familiar with how one best wields a blade such as his, and so less able to understand what his intentions may be."