Referee here. This is all correct here, in that it basically depends on the ruleset being used. Generally speaking, though, using the blade of the stick to "hook" the opponent's stick is considered "hooking" everywhere except in professional hockey.

I'll point out that the rules for professional hockey change much, much slower than everywhere else, because they will not change rules unless there's a competition reason for doing so - whereas in amateur hockey the rules are tweaked on a continual basis. This may be an example where the NHL has not updated their language to match HC/USAH/IIHF simply because this is not something you actually see happen in the NHL.

For reference, here's the actual wording of the IIHF rule:

DEFINITION: A player who uses his stick to impede the progress 
    or interfere with an opponent, with or without the puck.
i. A player who hooks an opponent will be assessed at least a 
   minor penalty.
ii. There are four common methods of hooking:
    1. A player who hooks the arm, hand, or glove of an opponent 
       who is about to make a pass or take a shot;
    2. A player who makes contact with any part of an opponent’s
       body using his stick during a one-on-one competition for
       the puck;
    3. A player who uses his stick against an opponent’s body to 
       prevent an opponent from maintaining puck possession;
    4. A player who uses his stick to prevent an opponent from 
       skating freely.
iii. A player who injures or recklessly endangers an opponent by 
     hooking will be assessed either a major penalty and automatic 
     game-misconduct penalty or a match penalty.

By IIHF standards, this play may - or may not - fall under 146(ii)(4). When this happens, I'm going to be looking for whether the action prevents the victim from "skating freely". If so, hooking will be called. If not, then I'll allow play to continue.