I'm sorry we weren't able to determine the cause of the slowness for you. Troubleshooting an end-to-end encrypted product is hard because you can't just see everything that's happening by looking at the server. We have seen ISPs deny or aggressively throttle connections to our destination networks. Palo Alto firewalls classify traffic to SpiderOak as an online backup service and often block it outright or put it at least priority. I'm not saying that these were necessarily the causes in your situation.
SpiderOak keeps improving and the 2017 road map is action packed. If for some reason you would ever like to try SpiderOak again on me, you're welcome to contact me directly, or write to support@spideroak.com where these days we do a pretty good job of taking care of everyone. Otherwise I'm glad you've found backup solutions you're happy with. Cheers!