Cool story? The post had nothing to do with whether or not it was achievable, or how many people could/would/should have been able to do it by now.
Let's get the facts down shall we? Firstly, the initial premise of the thread is "End game is too hard, requires too much precision and communication". Secondly, Darklight gear is i70 while BC is i90 (with CT being i80). CT is meant to be the step BEFORE Coil and the increase on overall ilevel is going to make encounters 'easier' by proximity. Finally, Yoshi claimed that less than 100 people would finish coil by 2.1.
None of that says that players shouldn't be able to clear coil, it just states the difference between ilevel, with a loose explanation why some of the fights are so damn tight and have little room for error. Further, Yoshi's statement implies the end content will be difficult enough that only a very limited amount of players will clear it, so by proximity, one could assume he doesn't expect 99% of the player base to clear Turn 1, 2, 3 and 4 prior to 2.1 either.
I've been clearing BC as well with Darklight and whatever I pick up through drops as well, and I've experienced first hand how tight some of these fights can be, but I also have the foresight to see what difference having i80 gear will make. As I mentioned, Turn4 is incredibly tight, and even an increase of 10dps on each player will make a huge difference during the encounter.
In short, you are correct in saying you do not need i80/i90 gear to clear BC (arguably excluding relic/+1), however it needs mastery over your class, and good communication and coordination, which are things the OP argued against, suggesting such content should not require such things (Arguably, what raiding should be all about). When the gear quality increases, the 'skill quality' can decrease in relation. Of course, those that maximise gear and skill will achieve more than those who only maximise one or the other. How much effort do you put into HM Ifrit with full Darklight and Relic+1 compared to when you were doing it in AF gear and an i45 weapon? What about when you do it in said gear and 'play hard'? There is a massive time difference, right?