Does anyone know if a 60gb ps3 has any video or input delay when playing ps2 games (at 480i)?
There is no lag if you run a PS2 game on a PS3 at 480i
. There are several problems with this however. First and foremost is that you must run the system at 480i in order to do this. Second, and perhaps more problematic for most people, is that you cannot ever get a 480i signal from the PS3 when using HDMI. The lowest resolution you may select is 480p. So if you are using HDMI then your PS2 games will lag under all circumstances when played on your PS3.
If you use component with your PS3 you can prove the above to yourself. Set your PS3 to 480i then turn on your PS2 game, notice the graphics and the timing, even filming with a camera if you like. Then change the resolution to any other resolution via the XMB, even 480p will cause the problem. The first thing that you will notice when your PS2 game starts is that the image will be a hell of a lot blurrier than it was when you were using 480i, and it is from this that all the other problems occur--"480p" is achieved via deinterlacing. That's right, as much sense as it would seem to make to just turn on progressive scan, the RSX deinterlaces instead.
Now just for fun, try this. If you have a PS2 game which supports 480p via either the button-hold method or an options menu, just start that game without changing your PS3's resolution via XMB first. Then use the button method or your menu to activate 480p. Notice that the image is crisp, not blurry, colours are brighter, etc. This is because activating the PS2's progressive scan mode overrides the upscale & deinterlace modes that the RSX does, it isn't possible to upscale the 480p image which actually looks correct and does not lag.