Québec is an exception here and do not follow merit based system. So the immigrants coming in Québec are not skilled or employable and is a burden to Canadians. On the other hand, skilled applicants in Québec are waiting 4-5 years for a permit from Québec because Quebec do not follow merit system. The new CAQ leader is also against immigration and has vowed to cut down immigration. So any startups planning to have an office should be aware of this. Québec IT employers are struggling to find talents because of the dysfunctional immigration department of Québec.
Now the highly regarded global talent stream is only applicable to large employers.
Startups still have to go the hard way. Getting an LMIA work permit will take 3-6 months and renewing it will also take the same amount of time.
Overall, Canada's Express Entry system is a merit based system. But the candidates do not need to prove their technical skills. Anyone with a Bachleor's degree, a good command of English and 3 years of work experience can get a residency in Canada. This doesn't necessarily mean there is talent. Moreover, a talented international worker might travel to many countries, so if you are an applicant who have travelled to many countries, 6 months express entry time do not apply, Canada will put you thru something called Security Screening which can last 1 to 2 years.
So the 6 months timeline are for people who haven't travelled a lot or worked at many countries. It's just for a less experienced Bachelor degree holder with a good command of English. Do not come to Canada for the money, salaries are not that great. Toronto and Vancouver housing prices are pumped up thanks to Quebec's money for citizenship scheme. Québec immigration is dysfunctional, so good luck finding talents in Montreal for your startup.