Well ... I think its more about installation times and the company utilizing Sony's background download process. When i downloaded Diablo III on PS3... it took like 3 hours to download and another hour to freaking install. Installation on the PS4 has never broken 3 minutes for me (i only play digital).

However, sony also implremented the ability to download the game and start playing while the rest downloads in the background (the same thing that blizzard utilizes with its games and patches).

They have the gaikai servers so why don't they use them? 

I'm pretty sure Sony throttles your downloads based on forcing QoS on people. If you upgrade or downgrade your ISP speeds... you'll notice that your PSN speeds seem to scale with the percentage that you changed.

I feel like the PS4 is about 30-35% of your max speed, the vita is 15% of your max speed and the PS3 just has a shitty NIC.

Yeah, I didn't notice any significant difference on PS3 downloads despite having 10x the speed that I used to. It's super annoying, the very reason I have a fast connection is to avoid all the waiting.

That's pretty bad. 

Yes and No honestly.

In a more heavily web based world -- it actually makes sense to enforce a form of QoS on a device like the PS4. The PS4 and Vita are both entwined in a marriage based on remote play and now PS Now. Also, if you remember the PS3 wouldn't download ANYTHING while you were doing ANYTHING.  Inversely, the PS4 will let you play games... but they QoS your download even more if you are in a game.

But more importantly, the ovewhelming majority of (almost all) gamers are too stupid and/or ignorant to implement their own form of QoS. If they live in a house with multiple other devices using the web ... its not really acceptable for that one device to eat up the entire bandwidth.

I just wish that IF I am right... they actually implemented an override... or some way to bring it up to closer to 70%.

I don't see the point of downloading a current gen AAA game when there's perfectly good retail copies of it.

I wouldn't be surprised if that's already the case. Most of what you download is game data. It makes more sense to have that compressed on disc. GPUs already work directly from compressed textures. Reading the data takes the most time, decompressing it on the fly is faster than reading uncompressed data. Maybe that also explains why switching to an SSD only gives a small advantage.

I've always worked in software with custom compression to keep the data size as small as possible, zip couldn't take more than a percentage of it. Decompressing to ram while reading is the best way to do it.

Yeah, the case with TLOU was pretty mysterious to me. I remember being able to play all the parts of the game from my old saves at 50% on ps3, If I remember right, I think I was able to play multiplayer as well.