While this valuation predates the most recent earnings report, I see little reason to revisit it, since the revenue growth and margins that Apple reported are actually in line with what I had used in my valuation.
The only reason to be wary of this IPO outperformer is the valuation and the magnitude of its recent gains, which may give you an argument in favor of waiting to buy and not trying to chase any rallies, but not in favor of selling.