They're doing it now fairly successfuly with limited time. What makes you think they can't maintain, or do an effective job with more time? Other universities recruit nationally, what makes you think Auburn can't?
A few of these guys were being recruited by coaches while they were at their previous employers. So, its not like they just jumped in in a months time and swayed some of these kids to come on. For example:
Tyrik Rollison 4*- was being recruited by Luper at OK St.
Nosa Eguae 3* - was being recruited by Chizik at Iowa St.
A few of them only had offers from scrub schools and would be incredibly stupid to turn AU down. For example:
Clint Moseley 3*- Arkansas St., Marshall, South Alabama, UAB
John Sullen 3*- Duke, Memphis, Southern Miss, Tulane, South Alabama, UAB
Izauea Lanier 3*- Kentucky, Mississippi State, Troy
Probably on the verge of committing:
Joel Knight 3* - was being recruited by Chizik at Iowa St.
Anthony Gulley 3* - Troy