Here is the traffic we saw immediately after posting our article.
52.27.2.86 Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0)
54.36.149.170 Mozilla/5.0 (compatible; AhrefsBot/5.2; News; +http://ahrefs.com/robot/)23.96.208.137 Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)
144.76.22.203 Mozilla/5.0 (X11; U; Linux i686; pl-PL; rv:1.9.0.3) Gecko/2008092510 Ubuntu/8.04 (hardy) Firefox/3.0.354.77.111.217 Mozilla/5.0 (compatible; YaK/1.0; http://linkfluence.com/; bot@linkfluence.com)
51.80.40.163 LivelapBot/0.2 (http://site.livelap.com/crawler)74.6.168.213 Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp)
80.252.171.70 Mozilla/5.0 (compatible; Twingly Recon; twingly.com)17.142.154.81 Mozilla/5.0 (Macintosh; Intel Mac OS X 10101) AppleWebKit/600.2.5 (KHTML, like Gecko) Version/8.0.2 Safari/600.2.5 (Applebot/0.1; +http://www.apple.com/go/applebot)
94.23.232.75 Ruby199.59.150.182 Twitterbot/1.0
31.13.113.65 facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)
173.252.115.7 facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)173.252.124.61 facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)
.... Also it look like facebook crawls as iPhone also173.252.124.123 Mozilla/5.0 (iPhone; CPU iPhone OS 1122 like Mac OS X) AppleWebKit/604.4.7 (KHTML, like Gecko) Version/11.0 Mobile/15C202 Safari/604.1
....