I've been using the blackberry torch 9800 for about 2 weeks now and at first i was a bit hesitant because of the reviews. The more I use it the more I'm getting addicted to it (mind you I used to use a blackberry 9700). It feels like a whole new blackberry and it's just refreshing to be able to use something different. The touch screen is very responsive, no lag whatsoever. OS6 is amazing. I really love the new web browser as I can now view full webpages and have several tabs open. Multi-tasking = blackberry's specialty. A lot of people are a bit unsure about the low processor specs but I really think this is to save battery life. Unlike the iphone...my blackberry can go for 2 days without charge. When I used the iphone I had to charge it every single day. Blackberry is a professional device so obviously the apps aren't that amazing. If you want to play games on your phone...get an iphone...or a psp. I use my blackberry to organize my calendar and to check emails. If i want to play games i have an ipod touch to satisfy my needs...and a laptop. I like the concept of having a slider keyboard. I'm not great with typing on touch screens so having a full qwerty keyboard makes typing a lot faster and more convenient. Technically by having the slider you've got the best of both worlds: touch screen and a physical keyboard. iPhone 4 vs. Blackberry Torch all comes down to personal preference. Will you be wanting a phone to keep track of work and email or a phone to play with/for entertainment. If you're leaning towards keeping track of work and email then I'd say blackberry hands down. The difficult decision is then Torch vs. Bold. That will be personal preference of touch screen or non-touch screen.
First few days I was hesitant about the Torch and considered going back to the Bold but now I can't let go of my torch. OS6 is amazing, the concept of the phone is great...and it looks great as well. Finally RIM is stepping up to the current market. They've just recently partnered with QNX so there will be some amazing apps coming out as well so looking forward to that!
Hope this "mini" review helps.