That sounds about right. BT has pretty slow data transfer speeds and it will depend on your connection strength and the length of the activity as well. Just make sure you have a strong cellular connection (or even better a WiFi connection) so it does not drop out while it is uploading.
@tfarabaugh @lampard Sad to see TomTom does not take this issue seriously. Seems like an easy fix with a massive improvement in customer experience. Please look into it, the upload from watch to phone is slow and fragile. I have to babysit the phone and it often takes several attempts for it to succeed.