Just had a go at Zwift to see if I would be having the same Speed issues as I'm having with Bkool. As expected, speeds in Zwift almost as accurate as real life. I also found the climbs much "easier" to go over, felt more natural.
I'm disappointed because I really wanted Bkool to be my winter training tool and be part of all the leagues you guys have, but with such inaccurate speeds, it's pointless to even try to compete in leagues. I still think Bkool have the superior product, just lack implementation!