Lou, you pretty much said what I did but I will take exception to the higher wing loading.

A higher wing loading means a higher stall speed and that stall speed can catch you unawares in gusty situations or when dropping down through the very strong ground shear effects that come with stormy days.

A heavier airplane with a higher wing loading only masks the effects by making the response to gusts seem less but a heavier or higher loaded model also takes longer to react to throttle or control inputs.