Dez Bryant and Felix Jones are the only Skill position players drafted by Dallas in the first round since 1997
In the 25 drafts under Jerry Jones, from 1989-2013, the Cowboys have made 228 draft picks. 64 of those picks were used on offensive skill positions (QB, RB, TE, WR) according to the draft data at Pro-Football-Reference.com. That's a percentage of 28.1%, the lowest value of any team in the league.
In the first three rounds between 1989 and 2013, 23 of 85 players the Cowboys drafted were offensive skill position players. That's a rate of 27.1%, the fifth lowest value over that span. You can twist the shiny toy myth any way you want, it won't make it any more true.
Of the 85 picks made by the Cowboys in the top three rounds between 1989-2013, 20 were offensive linemen. No team in the league has drafted more offensive linemen in the top three rounds of the draft over that span than the Cowboys. Calculated as a percentage, the Cowboys (23.5%) narrowly rank third in the league behind Miami (23.7%) and Seattle (23.9%) in terms of offensive linemen picked in rounds 1-3.