when two companies (zenter, omnisio) get bought off Google, another one (reddit) got an acquisition offer from them, others get funding from Sequoia, others from Atomico etc I think the role of YC it's pretty obvious and enviable from competitors, and although the statistical increment for success due to their aid may be 6% I think for better ideas/execution is really a lot higher.

none the less it's obvious by now that YC at least acts as a proven talent filter which I think is highly desirable by VCs