Here is the dirty and ugly:
1. Netflix and Amazon both downthrottle bandwidth during peak hours, which is any night other than Mo and Tue. As a result your 1080p movie will go to 288i quite often, regardless of box. This also happens with Amazon paid rentals fuggetabout Prime. Their techs will try to serve you CoolAid stating that the problem is on your side. Not true because:
2. VUDU would rather interrrupt if your bandwidth is insufficient. My ISP got very good past 1-2 yrs and I got total 2 or 3 such messages.
To exemplify I watch a movie on Netflix and get tired of downthrottling, rent it on Vudu minutes later and voila, perfect 1080P all along.
Happens on Roku, PS3, HTPC, and smart TV upstairs too, I can bet you it happens with all.
I will keep Netflix for the wonderful arthouse and foreign cinema they have, but if I want serious entertainment i go the VUDU/UV route every time.
Amazon movies I check in once in a blue moon to see if things improved, not the case last week when I paid to watch Ultraviolet, the jumped ship to VUDU 20 minutes later with revelationary PQ.
For once the retail monster is doing something well and IMHO with this and the $50 free shipping on online purchases they will take back from Amazon what it took away from them (KY and PA major shipping hubs for SE OH, 90% of Amazon orders come in 1-2 days)