Anecdotally, not enough to matter this is a legit phenomenon not an artificial event. Been on BlueSky about a year and in the last month about half of the big accounts I used to follow on Twitter have started showing up in my BlueSky feed. The tech and infosec feeds are starting to be as valuable as pre-Elon Twitter for staying on top of what is happening in the industry or just really interesting and insightful tech discussions. To me this was the biggest loss in leaving Twitter and it feels like a new spring right now.
Social networks are about the people and some of Twitters biggest draws for me have left for BlueSky. In the last month the vibrancy and activity in the community feels like it's jumped a to a whole new level. I think the real question is if they can sustain it.