I have made sure search suggestions are enabled, as per the kb http://technet.microsoft.com/en-us/library/jj721441.aspx, however when I go to Enterprise Search centre and start typing, no suggestions drop down.
I can confirm search is crawling files, as searching for terms and hitting enter yields correct results.
I have also tried 4 or 5 times the same search term, but no luck.
Any ideas on what to try next?