Expectation for Canon's *self-perception* of how many lenses being introduced constitutes a good amount at launch:
Placeholder - 1-2 lenses
Good Start - 3-5
Incredible Priority - 6
*Users' perception* of amounts at launch:
1-2 lenses - Really just a body that is used only with an adapter
3-5 lenses - Mostly an adapter body with one or two options for something small
6-9 lenses - Mostly an adapter body, but with potential to pick up native mount glass over time that is deserving (which means 25-35 percent of releases)
The big issue with the difference between those two sets of perceptions isn't what happens at launch, but rather what happens 18 months after launch, when people's expectations of a new mount lineup haven't materialized, and they have 3 crappy kit lenses, 3 lenses that are just slightly worse than new third party glass, but smaller, and 3 lenses that are fantastic.
The question of whether Sony should be tested will shift from Sony's various deficiencies - such as lens lineup, awful service, and Martian interfaces - to whether or not the Canon bodies are at least 80 percent as good as the Sony ones - the inflection point after which people are willing to consider switching.
It'll be messy. The biggest winner among all players will be Sigma, who will be offering a complete, fast, excellent lineup in all mount flavors.