1080p (60p) Recording from Sony HDR-CX290 looks grainy

[jtdude100]

I have been using a Nikon D3100 to record videos in 720p and it looks fine. this Christmas, i got a Sony HDR-CX290. I recorded a video in 1080 60p (.mts format) and it looks very grainy. i looked at the video with media player classic, adobe premier elements 10, adobe after effects, and as a private video on youtube, and it still looks like this:

I'm not sure if this is normal or not but I am used to recording less-grainy .mov's with my Nikon.
I can give more technical details if they are required. Thanks in advance!

 

[kenrivers]

What shutter speed did you use to record the video? Have you tried recording at 30p to see if you notice a difference?