Actually it does, its something only the end user can see for themselfs not in a review on a site with XYZ hardware, try it on your own.
As for games, it can help in many games but its been said not as much as years ago as games are coded better now but I know there is still sites will show you reduced loading times with Raid0.
I can again only add I noticed a big differnce in my whole wide use of PC with Raid0, I noticed no bad effects, even crashing PC during OC'ing did not mess up the Raid.
There are simply some who dont like Raid0 and cant seem to get out the past when HDD's were probably not as good as now and it was a high risk factor.
You should always have a backup if Single or Raid anyhow.
I dont see you ever getting a answer you will like on Raid0 or Raptors here, advise you read reviews and the peeps comments who actually bought the drives in the OCUK store.
The HDD is the slowest part of any modern PC, its a total bottleneck, I was given a good bit of advise about 2 years ago, the very clever person said instead of keep Overclocking CPU and GPU, add a 2nd HDD and Raid as you will actually feel/see the difference every day, he was correct.