This is a really great feature, one that I would certainly like to take advantage of... Prior to this, I've actually been manually uninstalling the jetpack plugin (which gets auto installed by my host, SiteGround, w/each WP install) as it has, in the past, proven to be really bloated and had a negative affect on site performance. Does anyone who has used it recently know if they've made in improvements with regards to performance (load time of sites using JetPack)?