[negrit]

It also assume they won't terminate the H-1B when the employee is leaving.

[snotrockets]

IANAL, but you can apply for a transfer without the original employer knowledge, and once that transfer is approved, then the previous employer can do nothing about that.

[baby]

From everything I read, your current employer HAS to accept the transfer. Makes it way more trickier than what the blog makes it look like.