A journal article published recently (July 2014) confirms that rotation-resistant and rotation-susceptible western corn rootworms are affected by Bt root tissue in a similar fashion. The citation for this article is provided below.

We have been receiving numerous phone calls about Dectes stem borer in soybean this year. We began seeing large numbers of adults in soybean fields as early as mid-June this year and populations appeared to peak in early- to mid-July. Now we are beginning to receive reports of severe infestations in maturing Group IV and early V soybean fields.

When checking out these plots, it's important to keep in mind their relative value and limitations.