14 point? Maybe her editor has really bad eyesight.
I have Geneva on my PC, but only available in my Adobe Suite programs, it seems. You can download & install almost any font off the net.
I'm finding more & more that I really like even writing in Courier, though I do write it in font size 10. I used to place more emphasis on how things look, and using such a generic font helps me to just think about the words themselves & stop obsessing about whether the font is representing the style of writing, gag gag. But every one is different!
Also, I would be a little cautious about advice like this from someone with an established agent & publisher, because she has a relationship with the editor & they may have worked something out that is particular to that editor. For someone seeking representation & first-time publishing, I would be very careful to just follow the standard.