At least they ask founders to be not mean [0] and specifically be nice [1] but do ask them to be relentless [2] and formidable [3], which may come off as shrewd?

[0] http://paulgraham.com/mean.html

[1] http://paulgraham.com/safe.html

[2] http://paulgraham.com/relres.html

[3] http://paulgraham.com/earnest.html