Its got something to do with HTCs stupid settings, you can flash a custom rom that removes that but I dont think it should be like that even with stock roms...
Very stupid by HTC... thinking of sending them a looooong email and also mention the battery power which is ridiculous...
To mention that the battery is pretty good for a 1280x720 screen thats extremely good looking and detailed ? Yea I'd guess thats a pretty good idea considering its a screen size no other phone has and it still lives for atleast a day.