I love this effect in FM6:
The drop movement is obviously exaggerated but looks amazing. There should be more weight in the drops resulting in a lot less movement. But what I like (DC does this too) is how the water from the previous right wipe travels across leaving streaks to the left side of the screen and is then caught by the left wiper (this is looking at the top half of the middle part of the screen). But it looks better here in FM6 due to the fogging of the window, something DC lacks.
Here's more on the point of weight: FM6 left, DC right:
Both cars are idle, water from the wipers in FM6 are treated with no weight/surface tension, it travels off to the side at a constant rate. In DC the drops are effected by gravity/surface tension and slide downward.
I think the variation in drop sizes is a lot more realistic in FM6, but they look like flat textures. DC is the opposite, large drops mostly but have depth:
At times the weather effects in FM6 can look a bit odd/disjointed, but when it all comes together correctly the weather effects can look fantastic: