Yeah I would trust that 70% figure and I would think it's even more than that, since devs aren't building tokens much on other platforms like Neo.  And yes, the tokens would require gas to send and so forth but that wouldn't *necessarily* drive up the price of Eth, just like increasing use of bitcoin to buy things doesn't drive up its price. 

I think the reason for that is that there's a relatively huge supply of Eth relative to what actually gets used, so it isn't enough to spike the demand and therefore the price, but that's my own thought and I could be wrong.  Anyway, Eth is sub $200, but that really isn't a bad price at all if you think about it.  By comparison Neo is trading at around $11 and many, many coins are well below that.  Eth is still #2 to bitcoin, remember.  That's an incredible feat for any coin, and I do think that it will probably begin growing again and will exceed its all time high within a couple of years.