Okay I got curious and spent several hours trying to find out any and everything possible on ATF.
Sagarmatha is the only seller that has the real deal. They are in Alaska and they do not send seeds to the US.
Real Alaskan Thunder Fuck is still available only by clone.
This is rumor "The DEA a few years ago tested a busted crop of MTF in the States that produced the highest THC levels they'd ever tested on record - 32%THC."
ATF made it unto International Cannagraphics Elite Clone list.
Check the strainbase under Peak 19 and Mantanuska, There should be ample info on Thunderfuck there. If I recall correctly, T-fuck is a forebearer to Mantanuska, which is a forebearer to Peak 19, which was specifically bred to incorporate the characteristics of the T-fuck.
And that is pretty much the most I could find. Unless you count the page after page of rumor and speculation.