Greg Cossell often remarks that what teams do with their personnel decisions is a true indicator of what a team thinks. I believe you can expand that argument and propose that other teams also confirm the notion that we have one of the deepest teams in the league this year by examining the waiver wire after cut-down day.
It is now known that we made a claim for an outside linebacker Jamaal Westerman but that Arizona got him first. Therefore we will most likely pick up Clark Haggins. Note that we only "intend" to pick him up, which leads me to believe that we will not sign him until after week one, not guaranteeing his full salary for the year. It was clear that Harbaugh felt there was one position on his team that actually had better talent on the waiver wire.
Here is a list of the waiver wire pickups (former 49ers players in bold):
Jets: NT Isaako Aaitui, WR Clyde Gates, TE Konrad Rueland.
Dolphins: WR Anthony Armstrong, LB Sammy Brown, DB Troy Nolan, DB R.J. Stanford.
Patriots: C Matt Tennant.
Browns: LB Tank Carder (Dolphins also made a claim), NT Ishmaa'ily Kitchen.
Jaguars: TE Brett Brackett.
Colts: LB Sergio Brown (Giants also made a claim), T Mike Person (Seahawks also made a claim), NT Martin Tevaseu.
Raiders: DB Philip Adams, LB Keenan Clayton, T Willie Smith (Giants also made a claim; pictured).
Redskins: DB Crezdon Butler.
Cowboys: TE Colin Cochart.
Giants: T D.J. Jones.
Eagles: T Nate Menkin.
Vikings: G Mark Asper.
Saints: DB Rafael Bush.
Buccaneers: DT Corvey Irvin, G Julian Vandervelde, C Cody Wallace (Redskins also made a claim).
Rams: RB Terrance Ganaway, DE Kellen Heard.
Cardinals: LB Jamaal Westerman (49ers also made a claim).
Four 49ers players who couldn't make our roster due to the depth of our talent are now on other teams' 53-man rosters. Chip in the fact that we actually got a draft pick for trading Colin Jones and that makes it five players signed by other teams to one player requested off of waives. You'll also notice that of the six players who had multiple claims for them, two were former 49ers.
In Cossell's model, these other teams see more useable talent in our castoffs than in their own teams' rosters. This is what leads me to believe that the waiver claims is a gleaming example of the depth of our talent in comparison to the rest of the league.