Piston to Wall clearance

Just looking at some pistons and I noticed some TRW Forged pistons have a wall clearance of .0015

Pistons like L2316F and L2329F are both that way but the big 12.5:1 340 pistons are .005 clearance.

Does this sound right to you guys? Why can TRW forged pistons run that tight, thats hypereutectic range....

Any other manufacturers able to run forged pistons with that kind of clearance?