Or is Bitcointalk still the most important address for every project?
Of course, you will understand it when you check all of this ICO, IEO directories/list has an option to input the project's bitcointalk ann thread. Seems like it's part the project's requirements to have presence on this very forum.
There was a time when it seemed that the relevance of this forum for newly launched projects died down a bit, but ultimately yes it seems to still be the most relevant place. There have been a couple of other forums, but I was too lazy to sign up for any of them.
The websites that aggregate new projects and give an overview are nice to have, but I am not sure if they are always up to date or even miss a good bunch of projects entirely.