Unable to switch time ruler to seconds

I cannot get my timeline to display seconds. It is always showing as frames. Is this format just the new thing?  I've been following a Lynda.com tutorial and you can see that in his timeline, seconds are clearly shown:

Whereas in mine, I get frames despite ctrl clicking.  This is the exact same project using tutorial files from Lynda.com.  The only difference, which should not be relevant, is that he is on a Mac and I am on Windows.

The standard answer in other forums (and on this one) is to zoom out

(for example, here: How to change time ruler time. and here: Time Ruler: Changing Frames to Seconds Issue (Picture) ),

but you can see I am fully zoomed out and this is a 10 second composition.