A small anecdote to do with the 'other side' of the lag.
Last night I was looking at Mazcoin - checked the forums, price history, all that. I noticed that it had already been pumped and come back down. That always makes me wary.
Sent 0.6 BTC up to a Cryptorush deposit address, but it was taking forever and a day to appear. I wasn't worried because I monitored it on blockexplorer and could see it was just waiting for confirmations.
Eventually I gave up and sent 22 LTC instead - which took about 3 minutes to appear !!
Then, upon checking the LTC market, I noticed that all the sells were sitting at 0.00079 (LTC) except for 1 SELL which was was a massive 134,000 MZC sitting there at a price of 0.00024 ! - a third of the market price. Instead of just buying it, I sat with a calculator for about 10 minutes because I didn't think it could be right. In the end I bought 108,000 of them and immediately offloaded half when the price doubled - which at that time netted me about half a bitcoin.
If I had kept those in it would have netted about 7 Bitcoins at today's prices, but then I would have had to break my rule of always recouping my investment at the earliest opportunity for loss mitigation.
That's the "wild west" of Cryptocurrencies for you. For every bit of luck like that, I've had about 5 fails - ike buying Mooncoin at 18 Satoshis, watching it go to 36 and then holding all the way down to 8 because I just couldn't beleive it wasn't going to go back up.
With 20/20 hindsight we'd all be millionaires 20 times over, but that's the fun of it - just don't bet your house !!