Ever hear of this minhag?

I am a yekke (and am proud of it). I do most of my minhagim according to the German custom.

That means I wash before kiddush, wait three hours after meat before eating dairy, do not wash mayim achronim, wear tallis after a minha aliya until after kedusha, etc.. (among many others).

The thing is, I did not grow up in a yekke community and did not grow up in a yekkish shul. I am therefore lacking in my knowledge of many minhagim related to the prayer services. It is not such a big deal because I still do not daven in a yekke shul (there is none where I live) so it probably would not work out anyway.

My brother told me that my Opa (grandfather for you non-yekkes out there) used to say that we (Yekkes) do not say "Baruch Hu U'Varuch Sh'mo" during brachos.

I never heard of this minhag to not say it and am curious if there is such a minhag and what the reason for it is.

I do remember being surprised when I learned that one should say it because I never said it as a child and only began doing so when I went to Yeshiva High School (which in America has become identified as the greatest cause of people not knowing their own minhagim and taking on other peoples generic minhagim).

Sometimes I thought we did not say things just because we did not know better, but over time I have found that a number of the things we did not say were because of minhag (such as the bracha at maariv said in America before shmoneh esrei for the latecomers), though there were also some that were not said probably out of laziness (such as "V'Yiten Lecha" on Saturday nights).

Anybody hear of such a minhag?