"only" 2 seconds slower. over a short distance that is an absolute lifetime. hayne's speed, if he were to concentrate on just sprinting, wouldn't even qualify him for nationals in sprints. the nfl is stacked with guys who can run, or are very close to running, olympic sprint qualifying times.
hayne, and every other nrl player does speed training through the year. his absolute fastest wouldn't be much better than what he has shown. he is a great athlete by our domestic standards but the reality is that he looks a hell of a lot better than he is because he shows what he has against significantly lesser athletes. i honestly don't believe he has what it takes to be a good nfl player,especially making the transition this late in his career (similar to izzy when he went to afl). union is a whole different story. a guy like hayne would tear that game apart playing alongside izzy.
ps. this guy doesn't "specialise" in sprinting but as you can see by his numbers, is freakin fast and can jump
http://www.news.com.au/sport/rugby/...o-olympics-video/story-fndpt9s1-1227083931683
he's a guy that the nfl would look seriously at. hayne wouldn't come close to him on raw athletic performance. much like a lot of the ncaa guys that won't make it in nfl.
like i said somewhere else, it's all just discussion stuff right now (and personal opinions) but we won't really know too much until 6-12 months down the track.