Sound is the obvious feature to compensate for having less dancing in DB.,Yes, many members forget about the language barriers, and the last thing anyone wants, is to put additional stress on girls when they should be feeling and expressing their craft in their own way. On this point, use of english girls like Sarah has an advantage in the initial stages in developing a following for talk/commentary (dirty talking) by artists in DB cards. Hiring needs to take this into account. Look at all the excitement around Jana Cova's return. Even though she's not english, she speaks it well.
"I'll tell guys at the studio to tell girls to talk dirty when they can / feel like it rather than (you're right 70's) moans" ..exactly !! Maybe run a lot of talking videos past the girls well before shoot time so they have many ideas of what to say, rather than script them. You won't have to do this with Jana Cova - she is a mistress at "bedtime stories" ;-)
Artists using moans is not bad, they just they need to be meaningful. Above all imho, it is critical to capture breathing gasps and exhallations and squish & suction sounds related to insertions in order to make DB move rapidly forward. And this is an area where with Totem's help, Czech girls can surge forward without the language issue getting in the way. I would buy cards with some happy wet fingers held up in triumph over any amount of dirty talking.
Good examples of talking/commentary by performer can be found in:
www.Twistysangels.comeg:
www.givemepink.com &
www.inthecrack.com where squirt whisperer uses moans, but they are irregular & spontaneous along with the talking.