Ok, so this is coming from someone who is a second-tier Nightwish fan, ie I have all their albums, enjoy them all to varying degrees, but don't listen to them regularly. I've also never seen them live till last night.
Holy shit. They put on a phenomenal show!
But first.... I talked to some people in line and inside, I'd say maybe 2 out out 5 knew about Floor/Anette. Those that did were not disappointed or bothered, and those that didn't did not seem upset. Some said that they just love the music, and trust Tuomas and the guys would fine a solid replacement. Others were excited to see what Floor could do with the band. Some didn't know who Floor was.
So the band starts playing, crowd goes nuts, and Floor comes out to sing Storytime. Big ovation. I was expecting maybe an introduction or announcement beforehand, but nothing. Still crowd goes nuts. No sense of "whoa... who the hell is that?" So after Storytime and Wish I Had An Angel, Marco introduces Floor. Big applause. No mention of Anette. A couple more songs, Floor kills on all of them. She came in early once, looked at the guys with a "Ah, crap" smile, and Marco and Emppu looked at her with huge smiles as if to say "shit happens, you are doing awesome" (at least that is how I read it). Tuomas jokingly cued her in, and when she came on at the right time, more huge applause from the crowd.
About half way through, Floor said there were a million things she wanted to say, but didn't know if it would come out right. She said she was moved, excited, nervous, honored, and you could tell it meant a lot to her. Huge applause.
You can find the setlist online, I don't recall it 100%, but it was solid. There was also a little acoustic section. The dude with those weird pipes (can't recall what they are called) played on some songs and it really added to the atmosphere and performance.
I think it was Adami who has said they have been lifeless on stage lately. Again, first time seeing them, but I don't think I have ever seen a happier group of guys (and gal) on stage. They were all smiles, energetic, interacting with each other and the crowd, and put on one hell of a show. It ended with more sincere thank yous from Floor, and raucous applause.
If you have a chance to see them play with Floor, please, please do so. Floor, I don't know what is on your schedule for the next 5-10 years, but please join Nightwish full-time.
Also, Kamelot put on a great show. I am even less familiar with them, but am trying to rectify that.