Somewhat is the short answer. The longer answer is that there are effectively three categories for games: those I will buy no matter what, those I may buy and those I will never buy.
Of the three categories, reviews and write ups will have no effect whatsoever on titles I will buy regardless and those I will never buy. For the other category however, those games I'm tempted by but not sure of, reviews will make our break my decision to buy or not. In order of most influence, recommendation from friends, recommendation from other players (eg. Here on this forum) and lastly, proper reviews can convince me if a game is worth it or not.
There are very few games now which I still outright buy "sight unseen". Elder Scrolls, Fallout, any CDProjekt Red game, a few others, that's it. Games I will never buy (unless they're insanely cheap in a steam sale, and then I'll likely never play them) are most big AAA franchises, anything that releases annually, anything Origin exclusive, most indie games that look like undergrad projects. For everything else, I see what friends, gamers and reviewers have to say before I decide.