Being a deep threat usually entails a short passing game that can eat up teams..You can be a deep threat and run in the 4.5s. Having elite speed absolutely helps in this department; however, how many of the uber fast speed guys end up having storied exceptional WR careers? A lot of them become one trick ponies who contribute occasionally and probably provide some help at KR/PR. What you want is a WR who can get clean releases, and can stack a cornerback. That, I would say is the most important aspect of getting deep. This is how Gallup was doing it before injury.
Turpin's size is a deal killer.but are they good WRs? probably not. just because they have deep speed doesn't make them a threat. otherwise every team would just raid the olympic 100m dash team and you would be set.
neither impresses me. one only weighs around 150 lbs, wet.