Well, the girls were from a Texas-ascendant timeline to begin with -- they're from UT Syrtis Major, after all (as Gokk says, "Hook 'em, Horns!").
Pg. 427: Lowella specializes in "World Tex
Pg. 429: Thuvia studies a Tex
peranto author, and Tweela seems to have a familiar logo plastered across her quite attractive posterior.
Pg. 430: "Expanding Texican
Pg. 536: Mal: "You arm your robots?" Bradberry: "Why not? They're Texans
Pg. 539: "For Davy's
sake." I don't think she was referring to Davy Jones.