For 2015 so far my desktop and tablet EPCs are identical and mobiles at 83.33%.

CTRs for both tablet and mobiles are higher with ecpms (rpm):

Tablet 166.8%
Mobile 117.3%

For me, mobile CPM is also about 50% of desktop. But it's been like that for over a year. Mobile CTR is about 67% of desktop, mobile EPC is about 73% of desktop.

The only long-term trend I can see is that EPC is down and CTR is up across the board. CPM is down slighty, mainly because I get more and more mobile traffic. It was about 53:47 for mobile one year ago, now it's 67:33.

I've always used a responsive layout. All these numbers exclude tablet traffic.

For me mobile RPM is 1/3 of desktop. And the RPM YTD is down significantly compared to the same time period last year. Bad trend for publishers and Google.

Just as an example for how drastic the drop has been.

In March 2014, less than a year ago, my Mobile CPM was a drop higher than my Desktop CPM.

Bad trend for publishers and Google

It's surprising that GOOG stock has managed to tread water this past year considering that the future is mobile. Maybe search ads are doing decent.

But the questions is what to do as a publisher? I'm seeing more and more Interstitials on mobile on "Brand" websites. I stopped using them years ago and considered it suicide since Panda because it's such a lousy user experience, but maybe Mobile is different?

An interstitial on mobile?

<shudder>

What about Anchor ads?
Adsense ads that are fixed to the bottom of the screen, anyone having success with them?

AdSense hasn't rolled that program out to everyone yet, as far as I know.

However I do have some show up for media.net. I'm not sure if they give me stats on those. One of these days I'll probably look.

I was able to test Anchor ads in Ad Exchange back in November and CPM's were ridiculously low. I was actually getting paid more for a 300x250 rectangle in the middle of the page than an always in your face 300x50 fixed banner.

Why do you think Google is taking so long to roll it out? It seems like it should be a decent solution for mobile.

The account rep I'm working with says low mobile earnings is a trend he's hearing a lot about.

Anchor ads

Will publishers be able to block those things?
.

For now you need special code just to run the anchor ad so it's difficult to imagine that Google will force publishers to run them.

Although other Ad Networks such as Tribal Fusion use the same ad tags to switch from a 300x250 on desktop to a 300x50 fixed footer on mobile and a 768x90 fixed footer on tablet. I wasn't even aware they were running it, although they did allow me to turn them off.
I'm pretty sure media.net does something simlar.

I was actually getting paid more for a 300x250 rectangle in the middle of the page than an always in your face 300x50 fixed banner.

On mobile, I found the first 300x250 rectangle in the middle of a page to be the best performing ad unit in general. Only medium and large rectangles above the fold perform better but they seem to violate the AdSense TOS. I'd be really interested to see how anchor ads perform for me, though.

Why do you think Google is taking so long to roll it out? It seems like it should be a decent solution for mobile.

Maybe they aren't performing as expected. I'm not overly thrilled when I encounter them myself.