u have drive-by-wire i believe. my '11 is the same way:( i have a fswerks cai and stealth exhaust. both made a major improvement on acceleration. but the ecu has to be reconfigured to get past the throttle lag. with mine i can actually squeal tires if i'm going 5 mph then punch it:) i'm sure someone will chime in with more useful info!
2011 Sterling Gray SES
SES #025/ Sedan Revolution #221