In many of the reviews I'd read before I bought Garry Kasparov's My Great
Predecessors, people mentioned that Kasparov had very few comments to make
about the games, judging from the scarcity of his initials after
parenthetical comments. Although I'm sure much of the analysis is by his
team, as has been pointed out, but as far as I can see, he only adds his
initials when he inserts something into analysis which he has attributed to
someone else, or when he is quoting someone else's work.