Has T-Mobile provided any evidence that their network is actually congested? They made the claim in this draft that it is/was, but then failed to show or link

Has T-Mobile provided any evidence that their network is actually congested? They made the claim in this draft that it is/was, but then failed to show or link to anything that would corroborate the claim. At the same time, T-Mobile benefits by blocking traffic that may compete with T-Mobile's other offerings (p2p voice/video connections).