Cracking open results returned by Ember peekAll

I'm playing around with peekAll(), trying to understand how it works for the ultimate purpose of iterating through the results.

In a route's model hook, I have:

var peekAllResults = this.store.peekAll('position');
console.log("peekAllResults = ", peekAllResults);
var peekAllResultsContent = peekAllResults.get('content');
console.log("peekAlLresultsContent = ", peekAllResultsContent);

This is returning data, as expected based on what I've got in my app.

In particular, here's what shows in the console:

So far so good. There are 8 records as expected based on what I've got going on.

But when when I add:

console.log("peekAllResultsContent.length=", peekAllResultsContent.length)

I get: peekAllResultsContent.length = 0

Same thing if I do peekAllResultsContent.get("length")

What is going on there?

I thought peekAll was a synchronous call that returned an array. Is there some trick to cracking it open and seeing what's actually in the array? I can't even get the length, so I figure I'm not on the right track.