Only if your detector or more likely coil is shot.
Using Relic mode and a fast sweep 9 inches on a 2003 quarter, 8.5 inches on a 1973 dime and just over 9 inches with a 2003 cent. This is in the house which is not the best place to do tests, with standard unadjusted Relic mode so a threshold thats over loud. Start accepting more rejected numbers and upping the sensitivity and Pre Amp and you can really add to the "depth".