throwaway99783

the iphone doesn't have a live jtag, does it? you can only use the jtag interface on hardware if the hardware is cooperating (by design) with you, it isn't a magic wand you can wave and get everything... additionally, ios does on-flash encryption of the data partition and you need the phone online to read it (or to get the key), so even if you could get some magical jtag port to give you up all the blocks that store user data, it would be encrypted...

I've worke for a few companies that make these products.

They largely depend on public exploits. If you have a fully up-to-date iOS device the odds are lower that someone using one of these kits can image it without a passcode. The companies that make these kits are really dumb and employ bottom-of-the-barrel developers that aren't really capable of writing good code, let alone finding jailbreak-type bugs in mobile stuff.

They also don't have the money (or the contacts) to buy the bugs, so, stick to phones that can't be jailbroken and you're probably safe against these imagers...