I have some questions about slow protein supplements. 1. Is Driver lactose free? I didn't see any mention of it. Being lactose intolerant, I prefer a lactose-free product over taking a lactase pill with every shake. 2. Would someone evaluate GlycerLEAN's claim to be a time-released whey? As far as I can tell, it is the only such product available. (By the way, it has an awful taste.) 3. I read somewhere that casein is associated with tumors. I googled it and found references to rat studies. If anyone is familiar with the research, I would appreciate a brief evaluation. 4. Would someone give a pro/con comparison of the various slow protein options (i.e., casein, egg, etc.)? Thanks in advance.