With the introduction of the GBC, the internal cart name has been made smaller. Is this correct ?

Yes. Rom location $143 was turned into a flag that indicated a GBC game so the internal cart name was reduced in size from 16 to 15 characters. The GBC flag is $80 for a GBC compatible or dedicated game. Any other value signifies a non-GBC game.

As of 1-Mar-99, all GBC games have an even smaller internal cart name of 11 characters. The four ascii characters following the internal cart name are now dedicated to the game product code. As part of this change, the GBC flag byte was changed: $80 = GBC compatible game, $c0 = GBC dedicated game. Any other values signify a non-GBC game.