I didn't mean it as a "charge", I was simply pointing out that until and unless it hits an inflection point there is simply no way of knowing which it is (unless there is a known limitation to growth, like the speed of light). Which is one of the reasons that I consider the arguments for superhuman AI far more significant than plotting curves.
Here's a great article by Paul Allen about why the singularity won't happen anytime soon. Basically a lot of the things we do are just not amenable to awesome looking exponential graphs.