Bits of that definitely looked slow, but as others have said, it was the first test run and the chain lift ran at an absolute crawl. It’s probably not the warmest, clearest day either; if it’s windy or cold, which wouldn’t be a surprise given yesterday’s weather, that could easily have affected things.
I thought some elements, particularly the first drop, Immelmann and entry into the outer bank, actually looked pretty promising given the circumstances!
It’ll almost definitely speed up, though. Based on how fast the lift hills on the likes of DC Rivals are, I imagine that the lift will be far faster during regular operation, and you only have to remember how similarly slow Nemesis Reborn went during its first test back in January compared to how it runs now.