Heavy Rain was released just before the weekend on February 18, 2010 in Japan and has already received a 226MB PlayStation 3 patch update.
According to PS3Insider.de (linked above), prior to playing the game users will be prompted to download and install this PS3 patch file which reportedly fixes some lag issues.
To quote, roughly translated: "Add to Heavy Rain, a patch has been released. The patch has a size of 226 MB.
This struck us as we have once again brought the same test specimen. What changes or bug fixes of the patch, is unfortunately still unknown. But apparently some changes are already before release to be necessary.
According to the patch, at least for us, a few trailers at the beginning of the game no longer occurred, but whether this really is related to the patch is uncertain."
For those curious, Heavy Rain will arrive in North America on February 23, Europe on February 24 and Australia on February 25, 2010.