Some users have a lot and exotic footer scripts on the website and sometimes Reedge scripts load variation slower because of these scripts. If you want Reedge to be the first script to load, you could add the following script in the footer before other scripts.

<script type="text/javascript">REED.footerInit();</script>

With this addition Reedge will load the variations before the other footer scripts load and you will speed up the switch.