First of all I want to address the obvious flaw in your reasoning:
if you disagree with this feel free to try any fast book of yours and attempt to beat my triple spawnpoint necromancer, my gate wizard....and for the sake of it... i could make a Priestess abusing the above mentioned cards as well.
The problem with that statement is that you are in the top 90 percentile of "experienced mw players" / competitive players. So you probably beat 9 out of 10 players who challenge you regardless of the deck you use. So if you beat someone it's not necessarily because your "triple-spawnpoint+ritual"-deck is stronger, but because you just played better, sry ~ :p
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That aside, it would be hypocritically of me not to admit that my own 2 strongest books are both using the Ritual and are both spawnpoint-builds.
And that nicely leads to the point I want to make:
How do you define a fast/rush book?1. First thing that comes to mind is probably this answer: By the amount of spawnpoint the book uses.
Example: If you are playing without a single spawnpoint you are by definition a rush/fast-book.
2. Another approach might be the question "in which turn does this book want to engage the enemy under regular circumstances?"
Example: If your strategy is to hit the enemy mage at least in turn .. 5? Then it's a rush book.
3. We neither ask how many spawnpoints a book has nor do we let an arbitrary number of turns decide if one book is a rush book or not, but we judge by the question: "What is the strategy of the mage?"
Example: If the book is tailored to attacking only the mage, never other creatures, conjurations or spawnpoints, then it's a rush/fast book.
Honestly, all of those ideas have merit. As long as we haven't even established what exactly a fast/rush book is, it's kind of strange to discuss how effective those books are. Because everyone is talking about a different book in their mind.
Taking up my earlier comment about how my two strongest books are ritual and spawnpoint books, I would also categorize them as aggressive, maybe even early aggression-books. But I would not say that they are rush-builds.
Maybe a good way to figure out how aggressive a book is to ask how fast they get to their dmg-peak or near it?