As it was once explained to me and as practical experience has taught me, concealed means 'hidden from sight', as in completely hidden from sight. No part of the pistol/revolver must be seen, period. 'Printing' can lead to possible assumptions, but with all the cell-phones and other belt riding personal accsssories available today not all that many unaware folks may think it's a gun. If your license says 'concealed carry', that means you hide it from the general public.
The other, and very real, benefit to completely concelaing your handgun is that those who might think to victimize you won't know you have it until it's too late for them. Also, you do not become a victim.
There wa a post a while back about a fella who carried openly into a mall - all perfectly legal where he came from, but the boys in blue saw that he was carrying, came up behind him, disarmed him, checked him out and then made him conceal it. Now, if a couple of guys can do that think what someone else could do if they spot a weapon on you. Not completely concealing a firearm can make you a possible victim.
Hide that baby so nobody knows whatcha got. JMHO. Mikey.