I'm really amazed this got so many downvotes, it's really true most the time, I had a lane against a Xin awhile back where I was going even but starting to fall behind as the ganks kept coming. Eventually I lost my lane to him, the enemy jungler, mid, and support all came top at some point, but never saw a single person from my team, I went 0/1 in lane, picked up pinks and warded everything up as best we could. We eventually lost the game anyhow as our jungler and bot lane fed really hard, but it at least really wasn't the fault of the top laner in that game.
Ganks and counter ganks in top lane win that lane more, we see it a lot in LCS games, or they decide to trade towers so they can utilize deeper warding to avoid ganks as much. It seems that the tier 1 towers don't matter much right now other than the team gold attained, if they are pushing your top lane hard go TP into the lane your jungler goes for as soon as you see him go for a gank and then kill that tower with your team, don't even worry about your tier 1 tower.