The symptoms you are describing are actually competely normal and are built into the shift parameters. If you search through this forum and go back about 6-12 months, you will encounter multiple threads describing this perfectly. Sadly, the only way to get rid of this hesitation is to get a tune (Which I would highly recommend BAMA).
As for Yankefan, that is NOT normal. Take it to the dealer immediately and get it fixed.
2011 3.7 V6 Premium, Black on Black Pony Package, Comfort Package, Security Package, Airaid CAI, BAMA 93H, 2.73 gears, SVT Strut Tower Brace, Llumar Window tint