Ah yes, that is a useful technique to slightly modify the highlight zones of the print, and the fixing effect can be overcome by the toning speed. I think I should have been clearer in my discussion of that (but if I remember rightly I was still recovering from a bout of some lurgy!
).
However, if the print is bleached significantly, the fixing could run far ahead of the toning and it is possible to lose a lot of density throughout the print, and end up with some very murky toner! A useful technique using full or extensive bleaching involves redevelopment in the same, or a different developer. This often affects how the silver in the print reacts with the toner, giving markedly different effects, I link to a couple of example prints from (there was a url link here which no longer exists) in that same thread.