Basic users will probably never notice the efficiency loss, but it is still there.

When 4G networks become standard, users should notice a difference.

Most users won't notice any difference, which is reflected in the fact that these units are still sold as M1000s.

If past form follows, most casual users may not even notice the difference.

It'll be interesting to see if users notice any effect.

"Individual users should not notice any slowness in the exchange."

I don't think most users would even notice it.

That said, there are some things users will notice.

The user will not notice that the document is empty.

They're a little concerned that users may notice some slowdown.