To a degree, but really, you have to read several reviews. I find scent to be very subjective. But for awhile over at Basenotes, there were a handful of guys whose opinions and tastes I often found were in sync with my own. If I saw a couple of them really liked a scent, there was a pretty good chance I would too (but not always).
In the end, I thinks reviews can give you an idea of some things you might like, once you have developed a wee bit of sense about frags. Specifically, if a reviewer starts referencing various notes or other similar scents that you're not familiar with, the review may not give you a good indication of how you would like it.