"Simpson managed the investment portfolio of the insurance giant Geico, a subsidiary of Buffett's Berkshire Hathaway conglomerate, between 1979 and 2009. He returned an average of 20.3% a year between 1980 and 2004, trouncing the S&P 500's 13.5% average annual return over the same period. Moreover, he beat the benchmark in 18 of those 25 years.

Buffett never disclosed Simpson's later results "because his performance made mine look bad," he quipped in his 2010 shareholder letter. "Who needs that?"

The Berkshire chief praised Simpson's abilities in numerous investor letters and during several Berkshire meetings. Buffett even suggested the Geico executive would take charge of Berkshire's portfolio if he and his right-hand man, Charlie Munger, were to meet a sudden demise.

so Lou worked for Berkshire for 30 years."

OK!

So we have 1 year out of 30 years where performance data was provided. So I can't agree with your "fact" that "less information is never good." The first year we did see a set of data was in year 25.

Here are Warren's comments in 2013 on Todd and Ted:

In a year in which most equity managers found it impossible to outperform the S&P 500, both Todd
Combs and Ted Weschler handily did so. Each now runs a portfolio exceeding $7 billion. They've earned
it. (They started with 3 each)

I must again confess that their investments outperformed mine. (Charlie says I should add 'by a lot.') If
such humiliating comparisons continue, I'll have no choice but to cease talking about them.
Todd and Ted have also created significant value for you in several matters unrelated to their portfolio
activities. Their contributions are just beginning: Both men have Berkshire blood in their veins

Maybe in a dozen or so more years we'll see something.