Some key points from Berman’s remarks:
The US is a much smaller player, in global terms, than the cheerleading would have you believe
The EIA (which if anything has a bullish bias) projects that US oil production will peak in 2016
Shale gas production is falling for all US plays except Marcellus, and that is estimated to peak in 2020
LNG export is a bad idea; the US can’t compete with Russian prices
Not to mention, many newer companies are deeply indebted.