Is all of the cancer death rate decline real?

OK, I've read some of the news stories you have about the drop in U.S. cancer deaths.

Some experts cite cancer screening as one of the possible factors. I, too, would like to look closely at cancer screening - but for a different reason.

Could it be that today's aggressive cancer screening is finding many early pseudo-cancers that may not turn out be deadly, but which are still categorized as a "cancer" diagnosis?

If you find more non-deadly cancers but still call them cancers the death rate is automatically going to drop.

I haven't seen anyone address that possible phenomenon. How big a piece of the pie could this represent?