PS. I looked up the figure and it's even worse than I thought. In 2004 55% of Texas Republicans cast straight party ballots. I had assumed the figure was about 33%. To reiterate for the general lurker public, a straight-party GOP vote will not register anything for the TX-22 House race.
It's a hurdle to overcome, no doubt, but a feature of the eSlate electronic voting machines in TX-22 provides some assistance to mitigate the damage.
A straight-party Republican voter in TX-22, and one who neglects to enter a write-in candidate for the U.S. House, eventually gets to the summary pages of all the candidates selected by their straight-party vote. On their first summary page near the top, printed in red letters, will appear the phrase "No Vote" on the line for the U.S. House race.
Hopefully, that will prompt some who know of the write-in race to return to that part of the ballot and write in Shelley Sekula Gibbs. I realize it's not good, but at least it provides some hope of catching some missing Republican votes for that race.