First, congrats on getting the job :) I'd think it's probably a mix of envy (we all know Google pays well, offers great perks and benefits, looks good on a CV,

First, congrats on getting the job :) I'd think it's probably a mix of envy (we all know Google pays well, offers great perks and benefits, looks good on a CV, etc.), and maybe fear - Google controls/funnels so much of how people interact with the web today, as a start-up you have to a) stay in their good graces and b) hope they don't come in to your start-up's space and stomp on you. Oh, and hope - to be bought by Google if your start-up's product is compelling enough ;)