[kohanz]

I think for many people, especially junior to mid-level hires, a few weeks is not enough time to achieve the familiarity, credibility, and just general sense of belonging to feel comfortable sharing genuine critiques. I would expect only senior-level developers with a lot of experience and confidence, would feel secure in their responses at that stage (and even then, it depends on how receptive your culture feels). If you want genuine feedback at this early stage, have you thought about enabling it anonymously?