The critical chart in the original article you posted mihal was IMO that Figure 10 showing the different shale plays and the gas price they need to make 12% IRR.
Only the SW Marcellus is profitable at $2 gas hub price! And that is mostly, I think, because it's a wet gas there so they get a lot of condensate.
Every other single shale play in the US requires at least $3/btu and most are in the $4-6 range.
I don't agree that this means there will be a bust. Most of the big players will be able to ride out the period of low prices by making a loss for a while, but as supply drops, demand will go up and the price almost certainly overcorrect and head up north of $6. Eventually it will stabilise around the $4-6 mark at which these projects are profitable.
