My guess is that your wiimotr sensitivity setting values are rather low. As a Wiimote player whose sensitivity setting values have always been high (hgih camera speed, no deadzones, hgih cursor and camera sensitiyvity), I think that anyone who shares these Settings or, at least, very similar to them, would quite easily tell the difference because it sure is huge. Maybe thats why my friend Riah told me she noted no difference: because she uses a high deadzone value and that stuff (when she gets final killcams).
Anyway, i think that Treyarchs decision to increaes the Target Assist values for us wiimote users like 2 months after the games release was not smart at all because, IMO, u cant expect a wiimote person to play the way they did before the patch NOW that the TA has been significantly changed, because they were used to that default TA settings, so what Treyarch basically did is ruin thsi game for me, unless they decide to set the TA loke it was b4.