S30 and lower play fairly gnar. Its like A+s that really know what they are doing so they tend to fend well.
S31 and HIGHER hower... PRE S70??
Its like we are back in B-B+ range nobody checks the map, everyone wants to super jump without scoping it out first.
S70 higher though is a lot of fun, the matches are usually never knockouts and are pretty great experience!
May I ask how you made that picture in your signature? It's really great :)
Since I've been through *most* of the ranks, here's what I've got.
(C-) don't really know what to do most of the time after getting a kill. Just learning the basics of combat and the game modes.
(C) A little better, but still basically C-.
(C+) By now the players have a basic grasp of teamwork, but are still poor combat wise.
(B-) Better weapon selection, learning slightly more advanced movement. Not much map awareness and still can't use their weapons to their advantages.
(B) A bit more map awareness, weapon choice still average, starting to get a feel for their weapons. Beginning to be more stealthy about their actions instead of just "spray-and-pray" all the time.
(B+) This is by far the hardest barrier to break in Splatoon. Many people cap out/plateau here, thus making them the absolute best at their current rank, but still poor in comparison to A-. These players tend to be a lot more sneaky, and have a decent grasp on their weapons. This is the area where people start to blame teammates for mistakes a lot, and there is still a lack of objective focus. Players incorrectly use their specials and subs often.
(A-) This is the epiphany, the big "Aha!" moment. After playing a few matches, suddenly everything zooms into focus and you now understand more advanced combat, use of sub weapons, and have better map awareness and objective focus. Still a ways to go!
(A) You now are a master of your weapon of choice, but your fundamental skills are still "decent" when they could be "great". Much better objective focus around this area. However, this is also the place where everyone tries to carry the game solo. Not a good place to stay at for too long, luckily, this rank is easy to pass.
(A+) You can play a variety of weapons with a good amount of skill to cover all the maps and modes, and your map awareness is great. However, you still find that you are losing matches "because of your teammates". This is another hard to break barrier, but not as much as B+. There are still some errors made here, such as knowing when or when not to advance.
(S) You can play a variety of weapons with great skill, your combat is top notch, and you've got the objective focus and map awareness down pretty good. You understand the advantages and disadvantages of all the weapons and know a good number of ways to counter them. You can find creative new tactics and routes, and your movement is fluid and precise. However, there's still something lacking...
(this last one is from personal experience facing against these players. I've never been to S+, still in S.)
(S+) You can now find new ways to overcome obstacles in almost any circumstance, and you constantly and consistently check the map to see your teammates positioning and always know the right angle to strike. Accuracy is dead on, timing on point, you're a near perfect team player. But as with everything, no player is ever perfect. There is still room to improve.
Sorry for this massive wall of text. Hope it's helpful.