From Ars Technica:
At this page, with Comcast having already verified your card, you can view upload speeds and decide whether to submit the order or exit the ordering system. The part of Comcast’s statement that upload speeds are “visible upon check out when you submit your order” is thus accurate. But refusing to tell a prospective customer what they’re paying for until after they submit credit card information is simply ridiculous. You can probably get upload speeds earlier by asking a Comcast rep in an online chat or phone call, but that shouldn’t be necessary.