[mrlmd1]

I've seen that video before but forgot where to find it. That shows without a doubt that countersteering accounts for virtually all the steering input on most bikes, and that shifting body weight or peg weight does almost nothing except on some off-road dirt bikes which have different geometry.
As was said before, by putting weight on a peg you may actually be pulling a little on the opposite handlebar, causing the bike to lean a little. We don't have bikes with 2 handlebars set up like the one in the video, so you don't really know what you are doing when you stand on a peg or lean over.
Regardless of whether you can get the bike to lean a fraction or not by shifting peg weight or leaning your body, without countersteering that effect is minimal and insignificant as was proved in that video.