Except for very few channels - CBC, CBS, PBS, WGN - all BEV HD channels are 720/60p.
From time to time they experiment with different resolution: beginning this year TMN was jumping between 720/60p, 1080/60i and 1280x1080/30p.
Bitrate can differ dramatically: from sub-10Mbps on PPV HD (almost always) to 10-12Mbps on TMN/MC, to ~12-15Mbps on VOOM channels and HDNet, Discovery (not always), to 17Mbps+ on CBC (Olympics, Oscar, etc.).
Diogen.