I think flash will slow things down, but not certain. I just got my iPad for Xmas coming from an android, and I'm really impressed w the speed so far. However it comes w gripes .... It's my first apple product, I'm really a pc ;-)
I am a PC user. Having received an iPad as a gift, I am enjoying using it and do find it useful in my work. However, I feel restricted by its proprietary nature such as very few music player options that can handle a wide spectrum of formats and no Flash support. I prefer being able use all formats and not be constrained on what I can access. Having said all this, I am interested in seeing where iPad is going and learning new ways to make this device into a useful business tool and entertainment platform.
I voted for Mac, but my employer makes me have to use windows, so I do use both. I have to state it is against my will however. If I had my way I'd use nothing but Mac.