IP check missing?

I noticed that in 2.x-dev and 2.0-beta1 on row 817 and onwards, in services.module, it says:

// Check if it really loaded user and, for additional security, if user was logged from the same IP. If not, then revert automatically.
if ($user->sid != $sessid) { ...

Where's the ip check? In Services 6.x-0.15 the code was:

// Check if it really loaded user and, for additional security, if user was logged from the same IP. If not, then revert automatically.
if ($user->sid != $sessid or $user->hostname != $backup->hostname) { ...

Maybe some new magic is handling this in the later versions - just thought I'd mention it.