[VoiceOps] Lower executive expectations for VOIP?

Hi, There's a thread on nanog about some gomer at idiot.net breaking a big hunk of routing because they didn't filter BGP properly. It got me thinking about running phones over the internet... In my experience, when we replace a TDM phone with a VOIP phone the expectations for reliability and quality are unchanged at the highest level. In other words, as long as its two lumps of noisy plastic connected by a stretchy cord thingy, the CxO's expects the classic (mythical?) five-nines of the TDM world. Do you get cut any slack just because its a VOIP phone, and VOIP is totally cool? Thanks, David