When I see a sentence that ends with ", too", I tend to place a bit more emphasis on the second-to-last word ("speaking", in this case), which ends up adding a

When I see a sentence that ends with ", too", I tend to place a bit more emphasis on the second-to-last word ("speaking", in this case), which ends up adding a pause. So the sentence goes, "The problem is that many people have horrible rhythm while speaking, too." To my taste, the sentence goes on a bit too long: an emphasis probably belongs somewhere in the middle: but perfection is hard to come by. :P