The high frequency rates of TVs of a comparable age and spec to this television range from 50Hz to 1,600Hz, and the average high frequency rate is 220Hz. At 400 hertz, the KDL-47W800 has a fairly fast high frequency rate compared to most of the other medium display diagonal TVs that were released more than two years ago.
It may also be worth also looking at one of the other 400Hz refresh rate TVs currently available including because of its better review score, the LG 42LM670S.
If this Sony TV high frequency rate is not fast enough for you then you might want to look at the Samsung UE40H7000 (£599) (600Hz) which also has a higher rating.
What does "high frequency rate" mean?