Yes, according to benga you dont have to swap discs if you install it. Ill take his word on it as I have not had the chance to experiment with this myself. Yet here is the thing...

You still have to install each disk right? I am pretty sure the info for the entire game is not secretly embedded in one but all of them. You will have to go from disk to disk and install them. I am not sure of 360 download speed for this but I can take a geustimate on if a PC takes about a few hours to do it the 360 will be somewhere close or longer. That is nothing compared to a simple PS3 install that would only be saving the redundent data from the disc.

As a point of reference, Gears of War took in the neighborhood of five minutes.

forevercloud3000???
A 360 game transfer of 6,9gb takes about 4 - 5 minutes.

In fact, many of my PS3 games installs took longer than a complete 360 disc transfer.

I heard these installs sometimes take 15-20minutes as told to me by my friend who owns one. This is indeed hear say might I add and I could be mistaken

I can't speak as to your friend's experience. His game may have simply taken longer for some reason.

Looks like Piggychan beats my X360 JRPG collection by 1 lousy game (darn his MMOs).

I'll have to post sometime in the near future.

Neither, JRPGs are just not my idea of fun.

If I get XIII (which I likely won't), then it'll have to be for the 360 since I don't HAVE a PS3.

it took me 12 minutes 59 seconds to transfer 1 disc.  Total install time for MGS4 was around 15 minutes so

I hardly see any difference between either systems transfer/install speeds.

I'll definitively import for the PS3, and when it comes out in the states, I'll see which version is better.... Though I must say, I wasn't a big fan of having to switch disks for IU... I had to go back and forth disk1&2 in order to get some achievements >_>...