The reason that games load slow... and the reason memory cards are so expensive can be summed up in one word! Freetards!
Freetards did their best to ruin the PSP with homebrew and illegal iso files.
So Sony had to go the extra mile to try to make sure piracy isn't such an issue, that way they can snag all the best developers without fear of their games being ripped off.
I picked up a 3G Vita on release day, and safe to say its the best portable console I've had (I have a 3DS and PSP still in regular use).
Price seems to be a sore point with everyone, yes its expensive, the 3G was actually more than £100 more expensive than the Morrisons bought PS3 I just got. But once you've used the device you'll realise where the money has been spent.
Once Sony master remote play for PS3 games onto the Vita and it better happen this time (not like the partial remote play we currently have, that was put in place for PSP originally) the Vita will become the killer portable handheld we've all been waiting for.
Oh and the pictures in this article clearly point to the 3G model being reviewed, I challenge you to get more than 3 hours of gameplay, minimum brightness (which is fine indoors), sound on, bluetooth off and 3G switched on.... ;-)