Too late to buy energy ETFs?

[fluff]

Hi,

I'm building an ETF portfolio which is about 60% stock (US and foreign), 20% REIT, 10% Bonds, 10% Material ETF (IYM). I'm 29, and the money is in there for the long term (5+ years min).

For this month I was thinking of adding IYE (energy/oil ETF, largest holdings are XOM and CVX).

Am I too late to join the bandwagon?