Looked up Tiger's numbers from the 2010 US Open (under Haney) and the 2013 US Open (under Foley) just for comparison. Also threw in Tour rankings for the year as well.
2010 US Open - Fairways hit: 69.64%
2010 Tour - Fairways hit: 57.21%
GIR: 64% (167th)
2013 US Open - Fairways hit: 69.64%
2012 Tour - Fairways hit: 63.93%
GIR: 67.58% (32nd)
By these numbers, it looks like Tiger is playing better under Foley. Looks like Haney may be talking out of his ass.
2010 not exactly Tiger's best year on tour. Compare 2006 or 2007.