I did wonder if that was something to do with diversions - paper tickets out yesterday too. We were about ten minutes late leaving, but it turned out that was due to awaiting a crew member rather than anything technical.
Yeah, there's more room inside an IET for sure. I like the subdued lighting in a Pendolino, but the small windows and cramped seating aren't great. I thought the ride was generally good, apart from some excessive forces around sharp curves, but to be fair, this was a WCML diversion, and tilt is used on the WCML for a reason. I'll have to see how the trains feel and behave on the ECML proper.