I believe TensorCharts app has even more realtime chart than Bitfinex itself. Few weeks back TensorCharts charts were updated from Bitfinex ticker (what you can see on Bitfinex), which is updated only once in 2-4 seconds. We later switched to raw trade history data and update chart every 10th trade or if traded volume since last update reaches a certain level.

Could you be more specific? How much do you think TC is delayed? Is price being updated according to trade history, etc... bugs happen all the time, so any details would be appreciated.