My '07 Classic tank is signed. Haven't seen it on the fender, I'll have to look closer.
It's a nice touch I think and nice to know the stripe is hand painted.
Triumph pin stripers have been signing their work since Triumph came back in business. Most, if not all pin striped parts are signed by the artist. My 2000 Thunderbird Sport was signed just under the seat line, If I recall correctly, it was by Pete as well. Really nice gold pin stripes seperating the orange scallops from the white tank.