Breaking down his league goals:
Arsenal H: 1, A: 1.
Bournemouth H: 1,
Burnley H: 0.
Chelsea H: 0, A: 0.
Crystal Palace: H: 0, A: 0.
Everton H: 2, A: 0.
Hull H: 0, A: 3.
Leicester A: 4 (end of season).
Liverpool: H: 0, A: 0.
Man City: A: 0.
Man Utd H: 1, A: 0.
Southampton A: 1.
Stoke H: 3, A: 1.
Sunderland H: 1, A: 0.
Swansea H: 2,
Watford H: 0, A: 2.
West Brom H: 3,
West Ham H: 2, A: 0 (Spurs out of title race).
So he scored 21 out of his 29 goals in just 8 games (4 v Leicester, 3 v Hull, 3 v Stoke, 3 v West Brom, 2 v Everton, 2 v Watford, 2 v Swansea, 2 v West Ham).
Which means he scored just 8 goals in his other 22 appearances (including subs). I think his figures are skewed somewhat by games where he demolishes cannon fodder, and is why in the back of their minds people just don't fancy him.