You've made a reference to Sylvia Pennington, but I'm unable to access any information about the basis for her views - her books are not offered for preview on google books. Can you clarify whether she offers any objective evidence for the strength of gay relationships, or was she just impressed with the quality of the relationships that she saw?

If so she is surely merely following the logic of Christians who refuse to challenge the remarriage of divorced people because the new relationships are 'so obviously healthy'. This offers no real basis for appraisal; instead we are seeing a purely subjective test being used to trump the traditional interpretation. To do so is very cuddly, but it doesn't reflect the call to obey a God who is far more interested in our eternal holiness than our temporal comfort.