Toyota is quick to point out it hasn't yet come to any conclusions.
Caution is a good thing.
Whether or not driver error was the cause of many of the reported incidents, one thing is certain: Toyota faces a public relations conundrum. It doesn't want to look like it is blaming drivers.
It's probable that many of the people involved in those accidents were long-standing loyal Toyota customers. Imagine how accident victims or their relatives are receiving the news trickling out now that is suggesting driver error as a likely culprit?
Consider business 101: The customer is always right.
Toyota would be wise to bear that in mind.