Over the last 5 seasons, our home winning % is .565. Our road winning % is .528. Most teams perform better, on the whole, at home than they do on the road.
Also, I wonder what the record is in west coast parks versus being at Fenway. (I'm too lazy to figure it out.)
At any rate, I have said more than once that the reason for our slow start is that team was not ready coming out of spring training.
That said, do I think the west coast trip contributed to the poor play? Absolutely.