No he hasn't. doctorj provided some good analysis that some may have conveniently looked over. His median valuation at the time with the available information was $5.80 which is still well above current price.
There were a number of posts at the time between karibas and doctorj, doctorj took an uber-conservative view (as is his right, and is often prudent) and karibas was far more bullish. It is all there in the threads, in black and white. At this point in time, karibas is vindicated.