Agreed CF is CF. Was hard to hear at first when DS was first diagnosed that there was no such thing as a mild form of CF, but we needed to hear it, so we could move on and be proactive.
Where I live, the sweat test is still considered the "gold standard". Last winter I read an article about a local child with asthma who needed digestive enzymes and feeding tube because of pancreatic insufficiency and just cringed. We have an accreditted CF clinic; however, when my husband's cousin was planning to have another child, she couldn't get a clear response on where or how to get carrier testing. Even DS's own local cf doctor sent me an email saying she should think "Long and Hard about why she wanted testing, as it was probably not covered under insurance".