I don't call it GNU/Linux. However, regardless of the percentage of GNU code, I think it is important to tell people that GNU had a central role in its creation. Why? Because it helps remind us of the value of idealists in society going forward. In any extended description of my Linux to the uninitiated, I feel like...
1. I should point out that the majority of code contributed today is by people working for corporations. To me this is important to point out because its fair, and because it helps remind my (relatively politically left-leaning) self that corporations as not inherently evil, but instead corporations are what they are, and are perfectly valid, great, and efficient in a particular role in society.
2. I should point out that the thing wasn't started by corporations. People motivated primarily by profit did not (and probably would not) initially create this thing I consider so beneficial. Idealists, and academics, did.
I may not agree with all of Stallman's positions. However, recognizing the importance of Stallman/FSF/GNU in creating "Linux" (as an OS, not just a kernel) helps remind us that idealists (and for that matter academics) are important and should be valued in society going forward. (End soap box...thank you)