Yes it's 100% from the developer. Here's a general overview of how it works.
The developer hires a sales company to sell their project. Usually the big Toronto developers hire either Milborne, or Baker (the two largest condo sales firms), or some smaller company like The Condo Store, Condo Culture, etc, or sometimes even some random Joe Blow sales company like CondoSalesMarketing Corp (I made that up) to do the work.
In this case, Milborne was hired as the sales team and these sales teams charge between 7-10% of the sales price for the contract and primarily provide admin services.
https://milborne.com
Next, since these sales companies are only sales people they have to outsource all the actual marketing work to a legitimate marketing company who comes up with the concept, branding, design, website, digital marketing, etc. For this project they hired:
http://www.thebrandfactory.com/
Once all the marketing material is created the sales company reaches out to all their "VIP" agents to sell the project and offers them 4% commission with some other incentives at times. They will give them an idea of the pricing, such as starting from the mid 300s, etc.
These VIP agents then proceed to email blast their buyer databases with details of the project in order to try to get them to fill out worksheets.
The Sales company will then release prices to these agents, but tells them that they are only allowed to show buyers on their existing client lists, and are not allowed to eblast them until a specific date. (In this case, the date is Feb 18th). Due to the competitive nature of real estate and most agents being scumbags, they often break the rules and do whatever they can to get a sale/client. In this case, one of these Agents blasted out the pricelist preemptively (It has since been deleted from their drive, likely due to a scolding from the Sales team(Milborne)). I took a screen shot of them before they were deleted.
These agents also flood the internet with crappy knockoff websites and google ads pretending they are the developer in order to fool people into registering on their websites. Google 1 jarvis, and you'll see 20+ imitation websites with stupid names like (my1jarviscondos, 1-jarviscondoshamilton, onejarvishamilton, etc).
Basically the whole pre-con industry is a ponzi sceme filled with a bunch of middle men all taking a cut, which ultimate leads to a roughly 10% unnecessary cost on all of the units. Without all these stupid layers of sales people and admin the actual price of the cheapest unit there would be closer to 300k, and that includes all of the developers profit.
So to answer your initial question, Yes, they are legitimate mrketing materials. lol