Interesting. So both you and those ladies misunderstood what the iPad can do.
What did I misunderstand about what it can do?
The weight is no issue for reading (at least nothing I've experienced). One-handed holding is my norm for the iPad.
Obviously I haven't read for hours on it like I have my iPhone, but the weight was very noticeable.
Typing is, surprisingly, so much better than on the iPhone. I never expected to be able to touch type, but sure enough once I realized you cannot lean on the keys, I started to touch type. Within a day I was typing the right way.
How did you know where your fingers were? I never look at they keyboard while typing and rely on the dots on the F/J to know where my hands are. When I looked down to try and type while not touching the keys I couldn't see them. Maybe there is a 1 handed typing method that will work best for the iPad?
As for the ladies, it's "just a big iPhone" in the same way that a swimming pool is just a big tub.
I just don't see it as that different except for the much larger screen. Maybe the next OS will really give it some divergence.