the draft industry in the US is huge
thousands of people employed in it
100s of mock drafts, podcasts, tc shows
its now spreading to the UK. 
Sky are sending Jim White of SSNHQ out to chicago for the draft on thursday!
covering the draft live too
anyway to give one example from just now
Neil Reynolds @neilreynoldsnfl 
Just filed mock draft for 
http://SkySports.com  1st round features 2 QB, 2 RB, 6 WR, 7 OL, 5 DL, 5 edge rushers and 5 CB. No TE or safeties 
which brings me to another one
its not as clear as the Running backs but you can also get 1/2 over 4.5 WRs
cooper, white, devante parker are top 15 picks
perriman is a first rounder 
any of strong, dorsett, green-beckham, aglohor could go in picks 16-32
the pivot point on the over/under is simply too low, i'd make it +/- 5.5
the quote means you need one. one plus of these will be a first rounder
after last year's brilliant receiver class, which evidenced that at this position players can come in and star straight away, this class is good too
over 4.5 is another good thing