This time is different because none of the coins on the list have the effective potential of ETH (again, not for debate).
ETC has a 6.5 day deposit time on exchanges, which makes it pretty hard to mine as small miners won't want to wait to get paid. This should come down as the hashrate (and security of the network) increases, however... without much network use (aka: utility)... the only thing to do with it will be to mine and dump.
Thus, the price of all the alts will drop, profitability will go down and cards will turn off. I'm already seeing signs of people turning off their cards in the GPU Miners forums...
We saw a preview of this behavior when Grin came out...
This whole argument revolves around exchanges not having a 'higher tier' user account profile model, which is simply not the case. Basically all serious OTC desks running out of exchanges work on this model and are happy to accomodate depending on your liquidity. If you are making any decent amount of money mining, they will be more than happy to enable a more substantial rotating deposit/withdrawal profile for preferred customer accounts.
I was referring to the small miners. On lower cap coins (everything but ETH/BTC, by a long shot), there isn't as much volume on the market, so even small farms will have a larger impact on price. Not all of them will have access to the OTC desks and they also tend to react in mass... when one freaks out, they all freak out.
