@Chip Bennett - Just to take a step back for a moment. The credit thing has been in place for both guidelines for a long time. The system seems to have worked. Only now am I really seeing a shift to have the same guideline for plugins applied to themes. What is truly broken because of the guideline mis-match?

What if I create a poll and I ask the question, should the credit link guideline for plugins also be applied to themes? Have Yes or No as the answer and then wait for the results. If the majority of people were to vote No because they are quite happy with the link showing up by default for their theme? Do you think make the change for the sake of consistency between the guidelines for each repository or do you leave things alone because the votes have shown they are ok with the way things are.