Look, there is no way I'm gonna trust what comes out of someone's PPM meter when you consider that maybe that person works in an office, has one of those meters strapped to them, and walks past God knows how many cubicles, playing God knows how many, varied radio stations. How is anyone suppose to divine any meaningful numbers from that?
It helps to understand some basic facts, first, Vinnie...the most important of which is that there is a minimum for incidental listening to be converted into a number. Five minutes. So unless you're walking very slowly past those cubicles, they won't count.
What does count? If your workplace plays, let's say KOST and it's audible at your desk to the point that the portable people meter can get the code, then that counts. Ditto the taqueria where you grab lunch twice a week for 40 minutes that plays KLVE. Ditto the barber shop that has KKGO on. Maybe you didn't tune the radio to those stations, but you were exposed (subliminally or otherwise) to what was coming out of the speaker.
Is it a perfect system? No. How flawed is it? I'm not qualified to say. But is it, as you put it, "capable of measuring anything with any modicum of accuracy, compared to the various Arbitron methods of old"?
Sure.
The Arbitron method was to issue a diary, in which you were supposed to write down all your listening for a week. What almost universally happened was that the day it was supposed to go back, the diary keeper tried to remember what they listened to...."Let's see....I usually listen to KBIG on the way to work, so I'll put that down for my 40-minute morning commute from 7:20 to 8:00 a.m. And I listen to John and Ken on KFI when I drive home from 5:00 p.m. to 5:40 p.m. So that's Monday through Friday." What that leaves out (because the diarykeeper honestly didn't remember) was punching out of KBIG to get the traffic on KNX and sticking around for the headlines and a couple of stories, which added up to 10 minutes, followed by a punch of the button to JACK-FM, which kept him for 15 minutes, then The Sound for 10.
KBIG gets credited for 40 minutes, and the other guys none...when the reality was JACK-FM for 15, KNX and The Sound for 10 each and KBIG for five.
And that's just Monday. There's six more days of fuzzy memory and get-it-done-and-get-it-in-the-mail oversimplification and guesswork to go.
Actually, with the way the diary method rewarded name or call letter recognition, it was skewed in favor of big-name jocks and big ad budgets. If anything, the little guys get an equal playing field under PPM.
And KRTH is still #3.