I am finishing up my second grow and tried both ways, and my experience says if you're already 5-6 weeks into flower, removing the bottoms probably wouldn't help the top yield that much. What is white widow, like a 9-10 week plant? I would think at this point he would be better off by maybe removing just a few, like the smallest bottom most ones, but taking off too many now would probably hurt yield more than it would help.
I did a couple side by sides both ways; if you have a lot of shaded undergrowth then lollipopping early on can definitely help the colas swell out more (if they can support the weight). Its all about the photosynthesis-- if a plant has a lot of shaded parts, then its going to be expending stored energy (sugars for now and starches for later) on the bottom of the plant that could be going to the top. Watts=weight, but only if you have the right number of plants (or correct space filled) and the plants can fully photosynthesize all the energy you're paying for.