As far as angles to make Bitshares posts Bitcoin relevent I've heard 2 suggestions.
"AGS taking donations in Bitcoin" is a good approach to get posts into the Bitcoin community.
The other option for the Bitcoin post is to point out the proposal to give 15% of p2p to BTC holders.
Any more suggestions like the 2 above would be appreciated.
I think I'll start up a post with #1 on reddit.
As far as targeting Bitcoin vs altcoin people, I find altcoin people a lot more open. I'm not sure if they're more valued though. It would be nice to make inroads with BTC people. They seem to have more money and resources in general. They just need to understand the innovation. They've accepted BTC, they need to accept the next step.