Wix consultants always blame their users for the slow loading sites. I have modified my wix sites many times to improve the loading speed according to information provided by Wix (consultants). But the changes did not help. Wix consultants make their users waste time and efforts giving users useless advice to conceal their own faults, knowing that the slow loading actually comes from their heavy engine, not from the contents of sites in most cases. Otherwise they are foolish. I have tested, with http://www.webpagetest.org/, one premium wix site with only one blank homepage, one text word "test" and a domain bought from WX. The test results show 5 seconds in USA and 13 to 30 seconds in Russia.
Wix shoud not make a fool of their users any more. Wix, blame yourself and improve the loading speed by yourself!