On Mon, 4 Jan 2016 19:20:38 -0800 (PST), wrote:

On Monday, January 4, 2016 at 8:02:04 AM UTC-6, KenK wrote:
Is it just my imagination or is it a little harder to pull an AC
plug that has been carrying high-current (10 A or above)out of
its socket than a low current (1 A or so) plug? If so, anyone
know why?

TIA

Heavier-duty outlets tend to be manufactured with thicker copper that is "stiffer" than the thinner copper used in Walmart type outlets.
Generally brass, actually