I have been wondering this for ages: Does Tommy Emmanuel, the one and only hybrid finger-picking guitarist from Australia have long fingernails on his right hand (the strumming and picking hand)?
Only recently I finally got the chance to see him live in Heidelberg (Germany) and even talk to him shortly afterwards. When I asked him that exact question he instantly said "No!". He showed me his right hand - no long fingernails! Not at all. He told me that this requests lots and lots of practising. He said that he didn't like the sound of long fingernails. It would be somewhat unnatural.