Has playing 4PC impacted your standard chess play? How?

I'm a relatively-weak chess player; curious to see if my experience matches that of others.  After many weeks of playing 4PC, I've felt an acute decline in 2PC performance.  I attribute it to the following factors:

1) The 2PC board just feels more constrained/compact.  It's hard to describe exactly how this translates into poor performance, but that each move has a feeling of tripping all over myself, blocking myself in, etc; and (to a fault) I'm inclined to "spread out" for the sake of spreading out (not for any tactical advantage).

2) 2PC is MUCH less forgiving than 4PC. In 4PC (at least, at the 1400-1600 level of play), blunders are frequently overlooked or ignored, as other players may have more important things to worry about than grabbing a hanging pawn/knight/etc.  

3) In 4PC, I think tactics are de-emphasized.  Because there will be 3 moves between each move you make, sharp tactical lines are inherently less likely to pay off and more likely to backfire.  I've found better 4PC outcomes with "just-play-it-safe" compared to e.g. "try to lay a sneaky trap for blue" (that falls apart when green and red go "off-script").    This mentality seems to have bled into my 2PC games... where it amounts to a "sitting duck" strategy :-)  In fact, anecdotally - I've even found the 2PC "tactics puzzles" to seem more challenging while playing 4PC.

Personally, while playing 4 way, I actually have gotten better at my normal chess games. in Daily, I have risen 200 in my rank. . .

I'm much more aware defensively, much better for my standard game

I'm finding that 4PC makes it much harder to come up with a plan. That is not good for your chess game. Team play does allow for more effective plans. You might want to concentrate on that.

uhm in my case the effect was positive... oh wait, I don't play standard chess anymore

Positive impact for sure. Board vision is huge, and small weaknesses are better appreciated.

In my case I have seen an improvement in my 2 player after playing 4 player. Mostly with spotting traps and looking a little deeper (note I don't play much fast chess so I do have more time in 2 player to look). I will say that the first week back from a few weeks of playing 4 player at the beginning I took a big hit like Kevin expressed. I found I needed to reset my mind on the basics for 2 player (stop playing as aggressive, build up, control the middle 4 squares, etc. Once I reset my mind then I saw the positive come through. 

I have gotten much better because I have learned to spend time wisely and think faster. I have grown better at spotting weaknesses and finding plans. When you have to beat three people on a huge board, you get a sharper eye for tactics. I find all variants improve normal chess. Variants make good drills!

If you are a strong normal chess player, it should have no effect, for better or worse...

4 player chess makes you think differently from 2 player. In 2 player, you're mostly focused on what's in front of you and your pieces are best coordinated towards control of the center. In 4 player, the player across from you is the least of your concern (unless you're playing teams); it's the two people to the side of you that you need to worry about, because they can attack you almost immediately. Protecting the flanks is very important in 4 player. And, of course the "enemy of my enemy" aspect changes things too; do I need to worry about green's threat, or is blue about to take care of it for me by giving green a bigger threat to deal with? 

I'd also that us play a bit more defensively that in two player, since you're technically outnumbered 3 to 1.

In my chess club today I just won like 5 in a row. . . I even 4 moved someone. . .

4 move mate isnt a sign of progress in chess

I mean, I memorized the moves to it so i consider it satisfactory.