GRASS CUTS YOUR SLIDE DISTANCE BY ABOUT 1/2.

Releasing/reversing the stick while dashing

Being released from a grab without going air born

Dropping the shield right after large force applied to shield (Unconfirmed. Based on past games, characters with low friction, like Luigi ,went farther from this kind of hit. It would make sense that it is still friction based in Smash 4 too)

Follow-ups on grab releases may leave more characters in jab reach, though they may still be able to get their shield up before the hit lands

Dash Attack Up smashing covers less distance (easy to see on Fox and Luigi)

If you have a bad habit of stopping or reversing your dash and putting yourself in the sliding lag state, you'll get out of that animation a little sooner (and hopefully won't slide right into an attack because you don't travel as far) he says from personal experience...

You need to be aware of the 5 Wii U and 4 3DS stages with grass on For Glory mode, as it may screw up your slide timing

Mushroom Kingdom U

Mario Galaxy

Yoshi's Island

The Great Cave Offensive

Windy Hill Zone

Mario Circuit (Brawl) (standard only, omega is grass free)

Skyloft (standard only on certain transformations)

Wooly World has normal friction despite the look and animation of the stage implying otherwise.

3D Land (standard only)

Golden Plains (Pipes have normal friction, even on the omega version)

Tortimer Island (The trees in standard mode also have increased friction)

Balloon Fight

Green Hill Zone

Despite looking like grass, Paper Mario has normal friction on both forms.

*DACUS - Dash Attack Cancel Up Smash. Canceling your dash attack animation at the start up with a jump into an up- smash to gain momentum and slide farther across the stage during the Up-Smash animation. Snake has a very visually obvious example of this in Brawl. Click for Video Link

I've been playing with the Omega stages on the Wii U version mostly to see if there were any size differences and came across something unexpected.Terrain Friction.Omega Battlefield and Final Destination were exactly the same, taking Peach 11 Dash animations (more like 10.5) to cross the stage. Upon getting to Omega Mushroom Kingdom U, it took 16 (15.5). Yet all the KO % were identical, so Mushroom Kingdom U couldn't actually be longer than Omega Battlefield and Final Destination.One stage over to Omega Mario Galaxy and it takes ~13 Peach dashes to travel the stage. That's when I noticed it. The little patch of yellow road made Peach slide forward slightly as her dash animation completed while the grassy areas did not.KayJay made a video to demonstrate this (thanks!)So terrain DOES effect your ability to slide and is likely the culprit causing the visual confusion weather DACUS* is or isn't working. The word on the DS 1.04 patch note thread is that DACUS is gone.UPDATE:Slides occur from:Rolling, walking, running, and fox trot (initial dash animation before sliding occurs) areeffected.Bowser's pseudo wavedash from Over-B custom 2 and 3 -might- be affected, but I'm not able to do it reliably enough to confirm or deny it.What does this mean?Wii U stages, Standard & Omega) with Grass (if it's green, it's grass and has increased friction):3DS stages with Grass: