[Captivate General] gtg465x:
Alright, here are my first impressions. I don't have one yet, but I got the chance to play with one for a while.

----Screen----

It's beautiful. The most impressive part is that blacks are truly black. The colors are impressive as well and aren't as oversaturated as the AMOLED screens on the Incredible and N1. Sharpness wise, the Captivate is on par with the Incredible and N1. Like the AMOLED screens on the Incredible and N1, these new Super AMOLED screens still aren't as sharp as LCDs. You can see jaggies if you look close. If you're coming from an iPhone 4, you will definitely notice that the Captivate's screen is less sharp.

----Launcher and UI----

Scrolling between home screens is pretty smooth. It's not iPhone smooth, and it's not quite as smooth as the HTC Aria, but it's on par with the Incredible and Evo and a lot smoother than the Droid X (which is awful). Swiping through the application drawer is iPhone smooth though, which is appropriate because it looks nearly identical to the iPhone interface. Scrolling through lists on this phone isn't iPhone smooth, but it's smoother than any other Android phone. Samsung has also implemented elasticity within many lists so that they bounce when you reach the end. I like it. Oh, and live wallpapers run like butter.

----Browser----

Scrolling around web pages is very smooth. Again, it's not iPhone smooth, but it's smoother than any other Android phone. Unfortunately, the browser has one major flaw. It doesn't reflow text to fix the screen when you zoom in. This is something you may not appreciate unless you've used an HTC phone or some alternative browser with this functionality. After using the Aria for the past two weeks, I can say that browsing is tedious and frustrating on the Captivate without this feature. I'm not sure if Dolphin supports this functionality, but if it does it would instantly become my default browser if I got this phone.

Update: It seems the browser DOES reflow text, but only when you double tab or use the buttons to zoom, not when you pinch to zoom. In light of this, it's not such a big deal. I could live with the default browser.

----Lag/Stalling----

Some refer to it as lag. Others refer to it as the stalling issue. Either way, it's real and it's there. I noticed it whenever I was in an application and pressed the home button to return to the home screen. I set my Aria next to it and compared them side by side. My Aria returned to the home screen faster every single time. On the Aria, returning to the home screen happened instantly, while on the Captivate it often took a second or two, or sometimes as much as 5 (yes FIVE) seconds! I first noticed the issue when leaving the Maps application. It consistently took 3 or 4 seconds to return to the home screen from the Maps application.

If it weren't for the fact that there is supposedly a fix for this (which isn't exactly foolproof and may have side effects by the way), this would be a total deal breaker for me. It's that bad. I really hope Samsung releases an update soon to fix the issue for those who don't want to go tinkering with the OS, but Samsung isn't exactly known for their support or quick releases.