No, I put more than 1000 hours in MW2 and BF3, never had I lag other than couple times in MW2 due to matchmaking with people with shitty connections.

The people who claimed there is lag on PSN are usually xbox people, the argument sometimes comes up when Live and PSN are compared, like yesterday from this guy
http://gamrconnect.vgchartz.com/post.php?id=5072335

"psn has mediocre online experience"

People make up such nonsense to justify paying 60 dollar for their service.

Played Black Ops 1 with a bunch of friends from work. After a few games, somehow, I wound up in another lobby and I couldn't rejoin.

None at all.

Saint's Row 2 refused to download and the second AC2 DLC took way to long to download. Nothing else

Aside from that, no real problems with PSN, itself. Sure, there are times when nobody is playing the game I want to play (for example, nobody playing SSF2 HD on PS3 while 360 still has a community) or it takes a while for a game to get started but that's about it. Not really the network's fault.

Never had any kind of problem. But this new PSN is painfully slow TBH.

When Black Ops 2 first launched I had issues where I was getting dropped from games, but that wasn't PSNs fault.

Other than that, just the occassional lag, which happens on anything related to online gaming.

Nothing here, looks OK. I've had problems with lags in some games (Transformers DOTM Online) months ago, but that was my bandwidth (I had 1 Mbps, now I have 5 Mbps and everything is great).

Normally, people complaining about lag is a connection issue. Some games need more bandwidth, that is clear when your connection is weak (like my old 1 Mbps). Resistance 2 always worked great, but Transformers and GT5 only started to play perfectly with 5 Mbps. You can't blame PSN by everything that happens. Sometimes it's a connection issue or the game. For those who think that Live is "lag free", try a online match of KOF XIII and see if the bad netcode works this way. In the end, people want to justify their 60 bucks that is free everywhere (PC, PS3, Vita, Wii U).