I've been going with WR-RB or RB-WR every draft and many times are alternating WR-RB-WR-RB for the first 4-6 rounds.
I'm always snagging a stud RB, typically being Lynch, CJ Anderson, Jeremy Hill, AP, depending on draft order.
My greater point is the level of WRs I'm still collecting: If I'm early, i'm snagging A.Brown or even OBJ, but my WR1/2 are consistently Calvin Johnson, Jordan Matthews, Mike Evans, Larry Fitz (I like him this year), Jarvis Landry and then a bunch of others that have high flying potential to me like Markus Wheaton, Eddie Royal (yes!), Steve Smith Sr, etc, etc.
To me it seems like a better balance and value. Again, if you ain't taking Gronk, what's the point?
I know DMD posts great stats about players ability to repeat performance, but there is just more sneaky plays at receiver to make up for it...