After 2 2013 attended shows I can start to make my minds about Ian in the place of Danny.
I am not a drummer nor a real musician so my words may be not 100% technicaly accurate but I rely on feeling during SOS.
During the Danny's years, SOS was the highlight of drumming, I could just concentrate on his palying and enjoy it.
One thing to do such a thing is as a quite big MK concert goer I could have the luxury to concentrate on one instrument without feeling spoiling my pleasure of the song, I had enough nights to attend that I could mute in my mind on one or too night the rest of the musicians.
The second reason is that SOS turned to be not as enjoyable as it used to be, so let take pleasure were you can.
So although not academic drum playing I had real joice listening the sole Mr Horsepower on that song, it was "a show in the show". Really fun to witness and to listen.
On the other side Ian's drumming sounds quite different than Danny's, I did not have the same pleasure to only concentrate on it, there is not the same entertertaining feel.
BUT what a drummer, because the result for the song as a whole sound just better. I mean that the 2013 drum part, strong tempo, is really to serve the song, so what you a are loosing in the "fun swing" is rewarded by an overall better performance of SOS.
I put Ian in the category of player that you won't particulary notice when he is in but you will notice the absence when is isn't.