That's a good point DJ. One thing that I would like to point out is that it might suggest that Edge could carry more of the load and was more versatile than the backs that we had.Don't forget that the main reason the Cards didn't have a 1000 yard rusher for several years was that they were splitting carries between two or more RB's.
2006 Edge 337 carries for 1159
2005 JJ/Shipp 269 for 821
2004 Smith/Hambrick 330 for 1220
2003 Shipp/Smith 318 for 1086
2002 Shipp/Jones 326 for 1345
Edge is also the first Cardinal RB with over 300 carries in one season since Ottis Anderson in 1981. Tomlinson by contrast has gone over 300 every year he's been in the NFL.