There's gun down, as in the Fitasc rules and there's fully mounted with gun in the shoulder and cheek on the stock, and then there's the cheat mount where the gun is held close to fully mounted but not actually in the shoulder and with cheek slightly off the stock.
After 14 years of reffing I would say that almost all the top sporting shots use the cheat mount for the 1st clay of a report pair and sometimes even for the 2nd as well if there's a time or distance gap between the shots.