I dunno. I'm barely starting out with this, and looking at all of the indie games being made doesn't really bother me much. I'm chasing an idea that i'm passionate about, (of course I need to work my way up, not planning on being able to begin making it into something anytime soon) so I don't really mind whatever else is going on around me. The only thing i'm slightly paranoid about is someone doing something similar to my idea before I get a chance to do it myself.
I strongly believe that an idea, on its own, isn't worth much/anything, and isn't the one thing that will define your game.
If given the exact same idea, two person start working on it without communicating, I believe it'll result it two very different games (you can replace "game" by any other artistic medium here), as it all comes down to execution: aesthetically, thematically, mechanically... so many ways to interpret an "idea". Case in point: isn't what Ludum Dares are all about, anyway?
So I wouldn't worry at all about seeing others do stuff. What matters, at least to me, is to get stuff done, *anything*, and eventually build from that towards what you're passionate about, even if what you're working on isn't directly linked at first. So keep truckin' :-D
(And do keep in mind: I'm saying this because I strongly believe it to be true, but I also completely understand where you're coming from and I'm fighting everyday those same thoughts, as my family nickname "Insane Paranoid" is a constant reminder).
I just happened on this whole discussion, but when you posted the lineart yesterday, I had a similar reaction to Jobbs'. The discussion about average or real life models has little impact on the actual picture you made, I believe, and I do feel there are visual similarities in the displayed sizes, whether those are actually real and justified or not.
Maybe there is something in your treatment that evokes such largeness, even though you know they are actually smaller? Going off the colored example you've cited of your ingame characters, I find the undershadows to be very present, indicating huge mass. The downward and curvature lines are also very elongated and continuous, indicating overall length as there is no break indicating chest/start of slope. Once again, here's a picture to hopefully convey my point better.
(Disclaimer just in case: I am not trying to offer any judgemental value to any of these, but simply to offer stylistic commentary to two-tone shading. Mass only changes from image to image because I need the shaded area to change.)
This is to me a matter of stylization and volume depiction, not real life proportions. We could get tangled all day trying to define what is "large" or not, and I'm definitely not trying to make judgements one way or the other (which is why I said nothing in the first place) - however, I think some of the visual tools you use to depict the breasts (mostly shading, but lining does play a part and is evidently what we're coming from in the case of your lineart) do make them appear "larger" than you might have intended, going by what you've been saying since the point's been raised, which is the only thing I'm reacting to. Maybe! Or maybe it's all perfectly intended and I'm dead wrong, in which case, the simple point that seems to stand is that they "appear" large to some of us, all other considerations non-withstanding, and it'd be interesting to understand why that is... I think?