But that's mostly DLC and dowloadable games you're talking about there. There's a difference between those and patches. I might email some people I used to work with and see if I'm talking rubbish or what...
My english sometimes fails me and I wasn't very clear.
Burnout Paradise by
Criterion Games was a game first shipped in the classic form of DVD (XBox360) and BRD (PS3) than after some time, I think one year, has been released as a downloadable game on PSN. This is not a small downloadable game, but a full standard game which weight around 3GB, always if I remember well.
I've downloaded it again a couple of nights ago and all I can say is that the full number or patches is way more than the usual, I'm talking about 5/6 patches with expansions, corrections and such. For what I can remember, it's one of the most supported game I've ever seen in this generation (and still played online).
So back to the topic, if you think about this, it shouldn't be clear why Sony would limit the number of patches, their weight and content, it's counter productive. If a game is released unfinished or badly developed in some areas, especially talking of GT5 a flagship product for PS3, it make no sense to put a limit on the patching process.
XBox360 is a different platform, with different point of view and more
closed from a software and hardware point of view (Unreal Tournament III and the mods not supported on the MS platform, only approved hardware, while I can connect my Mac bluetooth keyboard on my PS3).
Plus I remember, being an early XBox360 adopter, that downloads where limited in weight (DLC, downloadable games and such), but as of today I don't know if they've changed something in that department or not.
To cut a long story short: PS3 has no limited download or patches, as far as I know
Hope this makes sense ... with my broken english you know, isn't writing complex posts that easy.