Yes, definitely. Sometimes at work, I uber-multitask by doing work on my (slow) laptop and, while that is loading a file or web page, I also do work on the iPad.
Also, I was on vacation last week and usually carry my laptop with me to check work e-mails, etc. I experimented by just taking my iPad with me and all was fine. I opened attachments, wrote to customers, wrote to my factory, etc. I hope to gradually do away with the laptop on the road. BTW, I had the Apple portable keyboard with me and that helped.
Sent from my iPad 2 using iPF