This was analyzed a lot in the pre-draft-season ... how the NFL has abandoned the running game. But I see the numbers thru 3 games and it seems that it is worse than expected. Thursday Night, the Ravens had 46 pass attempts and 27 rushes ... The Browns had 52 pass attempts and 17 rushes.
I looked at all the week-3 box scores, comparing the pass play number, the rushing play number, and the carries by the back with the most carries. In total, there were 1180 pass attempts, 881 rushing plays, with 555 by the primary back. 2071 plays, 57% passing/43 % rushing. Unfortunately as teams use multiple RB's, the team leading rushers (in carries) account for 27% of plays.
For week 3, teams averaged 37 pass plays, 28 rushing plays, with 17 of those by the primary back.
There are 18 RB's with more than 200 rushing yards thru 3 games (1065 yard season pace). There are 31 WR's with more than 200 yards thru 3 games. 17 QB's are over 250 yards per game (a 4000 yard season pace). The drop off in fantasy points for RB's is steeper than ever.
I would say that the quality RB is rarer than ever.
I could post the team by team breakdowns for week 3 but the numbers are in a spreadsheet and lose formatting inserted into a post.