Horseshit and you know it.
Maybe you think they work honestly but i just dont believe that anymore.
From personal experience I can say that they have been very patient and decent. Maybe that's just my personal experience but I couldn't say a bad thing about Poloniex at this point.
It's true that they have shitcons there as well but show me one exchange that doesn't (besides Kraken and others in the bigleagues).
I'm not saying I'd trust them with my life or all my coins but my experience with them so far has been nothing but positive.
He does have a point pat, I have noticed that when coins are peaking the deposits/withdrawals tend to take longer than usual. It's only problems with coins peaking, other coins while not in peaking phase are working just fine. They are the middle man in control, so we really don't know how they set up their systems on their side or what they are doing with our BTC.
They add coins that are pumped and then dead a month later. Remember BTER has added coins before with backdoor deals with the coin dev (I think one of them was paycoin) in order to pump it and hedge the profits. What makes you think that all these "hacks" are not just attempts at stealing the funds in order to pump some weird new coin they have a backdoor deal with.
Why couldn't the other exchanges do the same as well? After all, exchanges exist to make a profit not for altruistic reasons.
I'll give you a personal experience, I was playing around a bit with the markets of a coin on 2 exchanges. Since there wasn't much activity and big gaps between sell/buy price I wondered if I could manipulate the volume and market cap. What did I find out? With a simple 0.005 BTC buy/sells, I could instantly pump the market cap from $300k to $600k, that's with less than $5 of me buying and the volume also reflected it accordingly. Seriously, wtf? Exchanges can easily create fake volume and price with very little BTC.
edit: With that said, I will sit back and wait for centralization of BTC to happen. It's only a matter of time before corporations and banks take over, why? Well because it's obvious that the world is not ready for a decentralized monetary system, this small experiment with altcoins and BTC has created a toxic community where the voices of the people that want to help out are drowned out for the voices of the scammers and greedy. At this point, I consider most devs just here to scam people for as much money as they can, most don't care for a better way of doing financial transactions, most don't care that this would help the world's population in leaps, most don't care about future generations having a better world ready for them. Most here only care about becoming millionaires, and that will be the downfall back into centralization. Decentralization doesn't seem possible at the moment, maybe in the future.