Nope never found it heavy myself but I have had the GTA and GT JTD both heavy engines upfront so not sure how a car with a lighter engine would feel, I'd take a guess and say that your car either has worn rubber or running low press ure which will have an effect on the car, dealers are murder for running 30psi to make the car more comfortable.
I have large sticky tyres and the JTD but yesterday I could still turn the wheel lock to lock with no effort when making sure the fluid pumped around, did this one-handed at standstill whilst not really holding the wheel by that I mean open handed palm on wheel doing circular motions and not gripping the wheel.