I received the (in)famous "wait for a date to attend phase 1" mail on March, and I'm invited for the 3rd of June. I believe I was just lucky but may be it's also because I contacted Ms Willems to ask when I could possibly attend phase 1. She responded that there's a waiting list, but who knows, perhaps contacting her and showing one's motivation helps to move up in this list (although I'm sure most of you have done it..).
It could be that we're just picked randomly for the selection because I don't really see the point in performing a pre-screening as you're invited for sure according to the "wait for a date to attend phase 1" mail. Besides my eyesight isn't the best either
So don't lose confidence, we're all at the same level and you will be invited eventually