I have an ipad right beside me and it IS a bit slow. A lot of things like viewing PDFs, webpages, even menus, are a tad slow and jerky. Infinity blade taxes this thing 100%, and even swinging the camera around when stationary is laggy and stutters. PDF viewing is full of lag and checkering. I think a lot more ram and a faster cpu (dual core preferably) would make the exact same experience much more seamless and enjoyable, and you can't argue with that. This thing was designed and released as a very basic, single tasking, app launching, oversized iPod touch. Developers are taking it and slowly making it into something more, and the iPad is really showing it's age early (largely due to the measly 256 megs of ram).
People who keep saying 'good enough as it is' are probably apple shareholders who WANT apple to screw over consumers, increase margins, and make them a few more bucks. Your opinions on a consumer forum should be void, and I consider them as such. Why wouldn't people want the latest technology and the fastest, most seamless experience possible? Just because you are so simple minded as to not see the possible benefit of a dual core processor and lots more ram, why should everyone else (and developers most importantly) be hindered by that sort of thinking?
Let me just say this... If apple uses a single core A8, then you can effectively think of the iPad as the "iPad 0.5". A marketing and technology beta test, with the iPad 1 coming out soon (what most people would call the 'iPad 2'). Then, hopefully in September if the rumours are correct (and if apple does release a pitiful 'iPad 2' with a single core A8 CPU and a low resolution camera) there will be an 'iPad 3' (effectively the iPad 2, as i'm calling it) with beefy specs and a higher resolution display.
Most of apples customers are technologically stupid, and buy products because they are very pretty, fashionable, stable, and easy to use (fair reasons for buying the products). This doesn't mean apple can't actually try and do some cutting edge stuff.