This was true, and widely known, even in pre-OS X days. I had a colleague who somehow contrived to drag a couple of thousand files onto his desktop, causing his (personal) Mac to go into a swoon from which it never revived. I’ll sometimes drag a web location icon onto the desktop, but I never allow more than half a dozen of these to accumulate. Seeing the typical Windows desktop with half the screen filled with neatly arrayed icons puts my teeth on edge. For the rest, yes, FTFF.