hahaha, this is pretty funny but not really true, i have read their source code and the main problem they face is caused by forking of the bitfinex API, since that is where they actually do the trading the website is just a portal. But i admit their server lag i extremely frustrating! I think if they fix this their site would assume some stability in the high volume areas of bitfinex order book (that is actually where the problem lies) and after bitfinex comes online they have to restart their server in order to resume their trading, this would not be necessary if they autosynced instead of only connecting to the API when trades are sent but autosyncing requires extremely expensive equipment, so i guess they just lie in a tought place in terms of net worth to hardware ratio.
Want to change your response now? HAHA, they are 504 and cant login to WD my 10btc, those pieces of crap! I thought I would have learned from GOX.