Yes, the terms for serves are confusing because some people call all serves that kick up high as kick serves (aka topspin serves) irrespective of which direction it moves after the bounce. These people then break down kick serves between the categories of kick-slice (aka top-slice) and kick-twist serves depending on the direction it moves after the bounce. I guess Gilbert follows this approach on what he considers a kickserve.
In the US, I think many players call only the twist serve as a kick serve or kicker at least on the courts where I have played. The top-slice or kick-slice is just considered as a high-bouncing slice serve by these players and they don’t call it a kick serve.
If a player can hit flat and slice serves as his 1st serve and can choose between a top-slice and kick serve as his 2nd serve, he has a lot of options to choose from. If he can direct any of these four serves to all locations (wide, body, middle) of the ad/deuce serve boxes, then he would be a precision server that is tough to deal with. However, I think most players have a favored 1st serve and 2nd serve spin that they like to use and it is rare to find the player who can hit all four spins well.