I went back into my Curve after trying the Storm out for a few days. I'd say the lag between clicking something and the software responding is about the same on both devices, but at least with the Curve I was certain I actually clicked it and that the phone would respond once it 'caught up'. With the touchscreen I was never sure, and thought I didn't click it right or something (a legitimate problem with the Storm in its own right, especially when clicking near one of the corners), and would click again, only for the phone to register two clicks once it caught up. And yes, I was using .75 and did the business card trick.
The thing is just slow, slow, slow. I'm very much a poweruser - I work for VZW and I have about 20-30 coworkers that all also carry Berries, and we're constantly using BB messenger, and I'm texting, emailing, etc, and using the browser, so I'm constantly switching between apps. I'll start loading a page, have a message come in, hit my softkey which is tied to the app switcher, switch over to messenger, fire off a message, switch back to the web page. (Should mention that I almost exclusively use Opera Mini.) I can do all this very quickly, almost in my sleep. With the Storm, I'd start loading the page, and be able to tell a message was about to come in - the hourglass timer thingie would pop up, the phone would slow down, and then would come the alert tone/vibrate. I'd hit the task switcher, wait, it would appear, I'd swipe my finger to move through the apps, wait for it to catch up, click the bbmessenger icon, and it would slowly materialize pixel by pixel... okay, i'm being a bit hyperbolic, but you get the picture.
Then there was the annoyance of autorotation while laying on my side in bed using browser
I now want an updated Curve with a faster processor and memory, like the Javelin, only with EVDO Rev-A.