It's not the day to day interactions. Hell, most of the companies I work with that aren't remote chat over IM and group chat while we sit next to each other. As I said, I don't think it's a breakdown of the tools. It's not that people aren't productive either. It's the "other" stuff that doesn't fit into those categories. There's no technology to replace sitting around with a group of guys having a beer. While its vague, it's just a different experience that Skype or group chat. It's a different setting and a different mindset. The things that are special are the things that don't fit into the normal daily workflow. For many companies remote teams might make sense and even strive, this is just my personal opinion of what I think is missing. So much of it depends on the company, the culture and the people.