Not sure what you mean. This is not a hacking site. Its a site for hacker news. Its not for startup's or information about google voice, nor for an explanation about iPad economics.
YC is a startup seed fund / incubator, most of the first users were all from YC companies, as shown by your "90%" figure most of the current users are still interested in startups, its original name was startup news and a lot of people still call it that.
slashdot / programming reddit / lambda the ultimate might be better places if you want purely programming news.