It is shocking to me that such an esteemed institution as [AC]RC would get John Wentworth's surname wrong in an announcement post. Clearly this is proof that their staff has no time to spare for proofreading. This must mean they are currently starved for funding and they need significantly more than the modest sum of $50M they are asking for.

To the mean discussion, I'll contribute by proposing the harmonic mean as an alternative point of compromise. I don't know if the harmonic mean has any desirable properties but the name sounds more prestigious compared to the arithmetic or geometric means, and as such is probably the good choice for fundraising advertisement purposes.