yes ppl are looking at titanforging as something they expect to get rather than just seeing it for the bonus that it is. if you don't get many TF's this tier, maybe you'll get more TF's next tier.
obviously the ilvl is going to increase so over the course of the whole expansion you'll have many many chances to get TF items. the encounters can't be balanced around the notion that everyone is fully titanforged, perhaps the numbers are balanced around the possibility that several ppl are clad in TF loot, but you aren't going into raids needing to be fully titanforged to clear the content. its just not that important. so long as your overall ilvl meets the requirement for the content you're doing, you don't need to worry about not having multiple tf pieces, it will help, but it probably won't be the difference between winning and wiping.