It was two weeks after the bad port reports... now the PS4 version is the second best near the 360 version.

PS4: 5.3 frames of lag
360: 5.1 frames of lag

The full changes.

• Reduced input latency
• Addressed matching not working correctly within the Replay Channel
• Fixed bug where character movement SFX are replaced by ambient stage sounds
• Improved online match performance
• Fixed localization issue in Spanish for the control customization UI
• Fixed bug where grey box appeared around OPTIONS in MY LIST
• Fixed resolution “snap” between menu transitions
• Fixed crash bug where leaving the game in Trials for extended period
• Addressed Juri pinwheel graphical corruption
• Added Special Titles (from Prize Codes). Note: There are no more Prize Codes, which is why the input is disabled
• Fixed bug where Title/Icon Scroll speeds were sluggish
• Adjusted volume of announcer compared to other sound levels
• Overall audio balancing to correct volume levels; several corrected audio bugs 

• Reduce interface lag within menus
• Addressed disappearing projectiles
• Fixed Decapre’s teleport animation
• Fixed Rolento’s audio glitch (during victory screen)
• Fixed missing SFX for Red Focus attack
• Fixed Akuma’s stomp SFX not playing
• Addressed bottom portion of the ON/OFF text being cutoff under the graphics settings in the Options menu
• Removed extra character ¦ that was sometimes displayed in Leaderboards at the end of a player’s name even if they have not set it to be there
• Fixed issue when seeking an Arcade match-up with LAN cabled disconnected and then starting up training results in a message ID being displayed
• Addressed Online IDs not appearing correctly
• Addresses issue when changing the HP bar’s HUD position in Options, the Online ID HUD position does not move with it and is displayed at the default position
• Anisotropic Filtering (AF) changes to decrease blur
• Fixed appearance of white box after backing out of a command list menu
• Addressed Fight Request issue in Arcade Mode 

http://blog.us.playstation.com/2015/05/22/ultra-street-fighter-iv-hits-ps4-tuesday-new-enhancements-detailed/

Only 0.2 frames of lag to be the best version... next patch will finally reach the goals.

EVO ready.

It's great that they're working to patch the game, but none of this should have been necessary. If it wasn't ready, they should have delayed it and saved themselves all the embarrassment.

I fully support that.

BTW the difference in input lag between PS4 and 360 is unnoticiable now.

That's actually awesome. The DS4 is much better than the 360 controller for fighting games too so, in my eyes, this just became the definitive edition of SF4.

No point having my old roommate get it now though since SFV will be out soon. I'll just play the 3DS version until SFV finally gets me to buy a PS4.

Maybe.

Good that they fixed it so fast, but it shouldn't have happened in the first place.

I remember that they messed up the PC port of the vanilla SF4 on PC and it ended as the version with the lowest input-lag and best netcode.

No fight pad. No buy.

Would be nice is capcom put in a modicum of effort into the port to make it not shit in the first place, but at least they're addressing the issues I guess.

...

Pretty shitty they released it and then fixed it within ~2 weeks... I hope Digital refunds come quickly to consoles so we can stop this kinda shitty way of doing business...

3.5 frames with V-Sync off: http://www.displaylag.com/reduce-input-lag-in-pc-games-the-definitive-guide/