3. Bitcoin price - You paid ~$10 per bitcoin in August 2012. You were unable to predict the price (since if you were, you'd be a multi-billionaire right now), so you elected to purchase mining hardware as a hedge against bitcoin going up. This let you lock in your price of bitcoins, and if it went down you'd be making back many, many more bitcoins than you spent. If it went up, you'd make less bitcoins, but you'd make more fiat... that is the whole point of mining hardware. It locks you in at a bitcoin value and gives you the potential to derive more wealth from the unit than you had previous, be it in BTC or fiat, depending on market trends.
This aspect of buying mining gear is what so many just refuses to understand.
The aspect of not buying the hardware is what Josh is ignoring.
Let us compare the cases of buying mining hardware for immediate instant delivery vs not buying the hardware and keeping the BTC:
Case 1) Buying hardware, spend 3000 BTC to get 1.5TH/s, we now have hardware in hand.
Case 2) Not buying hardware, we still have 3000 BTC.
Now, if the hardware returns less than 3000 BTC after mining is complete and all residual device value has been recovered, the investment was a bad one and Case 2 prevails. If the hardware generates more than 3000 BTC after mining is complete and all residual device value has been recovered, the investment was a good one and Case 1 prevails.
There is no case in which receiving any given piece of mining hardware later is better than receiving it sooner (assuming the hardware has a long operational lifetime). So you cannot add a delay in shipping to Case 1 and hope to improve it's returns. Any delay will always make Case 1 return less value than if there was no delay.
So, the idea that adding a delay to shipping has somehow enhanced the purchase of a unit of mining hardware is ludicrous.
If you still doubt, just replace the word "Bitcoin" with "ounces of gold". Josh says giving 400 ounces of gold for 5 ounces of gold back is a good deal, because the price of gold rose.