Let's look at the record:
Here are the lists of recruits credited to Bill Stewart:
2008* 2009 2010 2011
D.J. Thomas CB
Jerrard Hunter WR Ivan McCartney WR Marquis Lucas OL
Mark Rodgers RB
Will Clarke DL Travis Bell DB
Andrew Buie RB
Zach Hulce RB Taige Redman LB Qudral Forte DB Terrell Chestnut DB
Benji Kemoeatu OL
Pat Miller DB Avery Williams WR
Russell Haughton-James OL
Robert Sands DB Jonathan Scott DB
Dante Chambers WR Dustin Garrison RB
Ja'tavious Miller LB Terrance Moore WR
Bruce Irvin DL Brandon Jackson OL
Josh Jenkins OL
Brodrick Jenkins DB Jewone Snow LB Isaiah Bruce LB
Jerome Swinton DB
Tavon Austin WR Ishmael Banks DB
Paul Millard QB
Coley White QB Tevita Finau DL Doug Rigg LB Shaq Rowell DL
J.D. Woods WR Stedman Bailey WR Troy Gloster LB Josh Francis LB
Ryan Clarke RB
Geno Smith QB
Quantavius Leslie WR K.J. Myers WR
Tyler Urban TE Darwin Cook DB
Trevor Demko DL Shaq Petteway DB
Tevita Finau DL
Curtis Feigt DL Wes Tonkery DB Ben Bradley DL
Jorge Wright DL Nick Kindler OL Barry Brunetti QB Justin Johnson OL
D.J. Shaw DL
Terence Garvin DB Jeremy Johnson QB
Jared Barber LB
Bernard Smith LB Ryan Spiker OL Mike Dorsey LB
Nick Kwiatkoski LB
Courtney Stuart DB Pat Eger OL Trey Johnson RB
Dante Campbell WR
Brantwon Bowser DB Daquan Hargrett RB Marquis Wallace OL Brian Athey QB
Tyler Bitancurt K Shawne Alston RB Benji Kemoeatu OL
Kyle Rose DL
Larry Ford DL Jordan Weingart OL Quinton Spain OL Vernard Roberts WR
Joe Madsen OL Cole Bowers OL Deon Long WR
Vance Roberts DB
John Bassler OL Dominik Davenport DL Cody Clay TE
Chris Palmer DL Deon Long WR
Donovan Miles LB
Branko Busick LB
J.J. Dorsey QB Chris Snook LB
Jeff Braun OL Logan Heastie WR
Terence Kerns RB
*The 2008 recruiting class credit goes to both Stewart and Rich Rodriguez's staff, but ultimately was signed by Stewart
Of the players listed above, these never qualified, left school or transferred before seeing any meaningful playing time, or qualified and never made an impact on the field (to keep subjectivity to a minimum, for this purpose, we'll define impact as playing in more than half of a single season's games):
2008 - Thomas, Hulce, Kemoeatu, Miller, Swinton, White, Finau, Shaw, Smith, Palmer, Dorsey, Kerns
2009 - Hunter, Scott, Moore, Finau, Spiker, Weingart, Davenport, Long, Busick, Snook, Heastie
2010 - Forte, Chambers, Leslie, Brunetti, J. Johnson, T. Johnson, Wallace, Kemoeatu, Long
2011 - Lucas*, Haughton-James*, Jackson, Bradley, Johnson, Athey, Ve. Roberts, Va. Roberts
* - Offensive Lineman who didn't play much this past season but were on the two-deep
Attrition happens everywhere, let's not kid ourselves about that. But look at these percentages of players not making a difference:
2008 - 12 of 27, 44%
2009 - 11 of 26, 42%
2010 - 9 of 21, 43%
2011 - 6 of 22, 27% (if you remove the 2 OL guys listed on the two deep)
Removing those two lineman from 2011, 38 out of 96 didn't pan out for a rate of 40%. If you're over-signing large classes every year, this basically compensates for itself. But when you only take 21 and 22 for two consecutive years, you've lost more than one whole recruiting class in a three year cycle from 2009 to 2011.
From what I've been able to find out, losing roughly a third of a class is normal, but that's over a four year period.
THIS WAS NOT WRITTEN BY ME. I COPIED AND PASTED IT.