Ok, did a bit of research on filmic pro. It can use binning mode at 720p, but not at 1080p. They lower the noise by shooting at 24fps (can also do 30). Its actually not bad, but still has a few problems. One main one is frame dropping. It does indeed increase the bitrate (claimed up to 48MBits/s), but the high rate causes rolling shutter and frame dropping problems (there are several examples on youtube - most evident at lower light levels). They suggest tripod mounting. Don't get me wrong, its a great improvement on the iPhone's standard video, and yes in good conditions, it probably does give the pureview a run for its money (with the bog standard nokia camera app), however as pixel binning is only available at 720p, performance outside good conditions is worse. There is also no zoom (a big pureview plus), and they can't make up for inferior audio recording in software.
So bottom line is still, in certain circumstances, the iPhone (with Filmic pro) can indeed hold its head up high, however it still can't match the pureview in lower light, zoom, and audio. Un-jailbroken (hence no filmic pro), the iPhone is no match in any circumstances.
So I stand corrected with regards to Filmic pro, but still maintain that the pureview has better video recording, for the reasons quoted :)