From my experience, working with any vendors from the pacific northwest, they're all MS shops. Is this trend changing considering the added expense of working with any MS Licensed software (where an OSS solution with little or no cost could suffice)? Does MS offer incentives to local startups to build their platform on existing licensed MS products? Or is it more of a Seattle Pride thing? I personally don't feel the…
As noted by others, _startups_ - being created from scratch by people choosing their tools - absolutely use a wide variety of platforms. I expect that the numbers would bear out a higher percentage of Microsoft-based startups than in other locations (and there are a number of successful startups in the Seattle area with Microsoft-based platforms), but it's certainly not a significant majority.