[lores]

My point is that even knowing the work culture of SV does not mean that people necessarily believe it applies to interviews too, or that a suit will be a negative point, rather than good or neutral. There is a strong culture of looking smart at interviews that overrides knowledge of day-to-day attire. If you really care about people being in casual clothes, mention it in the invite, rather than looking down on them for doing what has been ingrained to be appropriate.