TCU’s defense is much better than ISU’s and it does force turnovers. As I pointed out, TCU's rush defense is #1 in the conf and it’s no surprise that they lead the conf in interceptions (16) – we are second
with 13.
A little context. TCU strength of schedule is ranked
#180. Compared to ISU (#7), Tech (#11), OU (#21), etc. Their S.O.S. is so low because they haven't yet faced the Top 3 teams in the BigXII, KSU, OU, UT. Basically, they beat up on bottom feeders (KU, BU), competed with some middlings (Tech, WVU), got destroyed by other middlings (OSU, ISU), and haven't yet faced the top teams.
I'm not saying we shouldn'e be concerned. Every game from here on out is huge. It will be their superbowl and, with bowl eligibility locked up, TCU's got nothing to lose. But, when citing TCU's defensive stats, it's important to put those numbers in context.