I ditched Dolphin a couple weeks ago because I love Zephyr and those side panels were getting in my way or wouldn't work when I needed them to so often that it was literally driving me insane. I went back to Safari. I still have dolphin becuse it has a built in download feature that is fantastic! I have a bookmark in iFile for the downloads folder in dolphin. Being able to download anything on the web is a HUGE feature that I use all the time. Plus dolphin has full screen mode and a built in user agent faker. Man of they just include a feature to disable those side panels I would never use another browser!
Having said all that, I am testing Chrome out now since people are raving about it. It lacks a built in download feature, no full screen mode and no user agent faker. Now obviously some or all of these things could come in future updates. Chrome for iOS does have the ability to sync with your desktop browser and that's great if you're reading an article and have to quickly leave your home. You can instantly pull it up on your iphone. And vice versa. But thats a feature I'll never use. Chrome definitely feels a bit quicker than safari but any speed increase I may get, we're talking milliseconds lol. Definitely under 1 or 2 seconds, so really, at that point I'm splitting hairs.
I still think dolphin is by far the absolute best browser out there for iOS except for people who heavily rely on Zephyr. I stopped using it as my daily browser but hopefully someday they add an option to remove those sliding panels on the side. But whenever I need to download something on the web, I always use dolphin. Then open iFile, tap the bookmark, and I'm staring at the file. From there I move it to where it needs to be depending if it's an image, music, video, document, etc. It's hard to argue against a free download manager built into an iOS browser on a jailbroken device. Very, very useful.
So for the next week or so I'll use Chrome as my main browser and see how it goes. But there is no way in hell I will delete Dolphin and replace it with chrome. That's my take! Hope it helps.