The conclusion is bad. It is not incorrect as much as it is incomplete..
When you are the chip leader, you are playing aggressively, but not necessarily bluffing. Yes there will be more 3-betting and C-betting but that is just aggression.
Also, it is possible to bluff online as much as it is possible to do so live. The problem is that mostly, people are playing micro stakes, where, sorry to say, majority of the players are bad. Bad mostly in terms that they are "calling stations" and those you just can't bluff off of hands. Also, the problem with bluffing opponents is that, people seem to think that it is enough to BET for the bluff to be successful but it is actually about representing certain hands with bets that should seam as value bets to your opponents.