Actually, the source is hosted at git://git.macruby.org/macruby which is owned by Apple.
So yes, unless you provide the evidence to support your claims, I'll assume that all MacRuby work is being done in public on macruby.org, similar to how other Apple open-source project work (llvm, WebKit, clang) and that the amount of that work is representative of Apple's commitment to the project.
In comparison, if you do similar stats on other Apple projects (like llvm, WebKit) you'll see that they have order of magnitude more people working on them, producing order of magnitude more code.
There is one branch one the repo: master. There are no feature branches whatsoever. What kind of workflow for mainline development is that?
There are also no commits referencing iOS at all, despite Laurent saying that Apple have been working on an iOS port. Assuming Apple is working iOS compatibility, one might assume that they are targeting a future major iOS release, e.g. iOS 5.0. That is something that Apple categorically would not do in public for obvious reasons.
Laurent's commits are too few and far between lately for someone purported to be on MacRuby full time, to me they just look like cherry pick commits that fix serious bugs.
Like I've said before I am not saying what Apple is or isn't doing. You may be right, but what you have said is hardly compelling evidence. Apple is hardly going to carry out development in public on something that inadvertently reveals features or implementation details of of their golden geese products, i.e. iOS devices.
Also, if there is no commit referring to iOS, it's mainly because iOS is a very secretive project. You don't know what he actually worked on. You don't know if maybe he has local / internal (aka @ apple) changes concerning iOS.
Plus if Laurent's commits are too "few and far lately" as you said, it's probably because he either have other Apple related stuff to do, or simply because he doesn't want to add new features (yet) that might break before he releases 0.7: http://lists.macosforge.org/pipermail/macruby-devel/2010-Aug...
Laurent tends to work on new features on his own branch, often experimenting new ideas, and once it "stands on its own" it merges it for everyone to improve/change it together with him.
So yes, unless you provide the evidence to support your claims, I'll assume that all MacRuby work is being done in public on macruby.org, similar to how other Apple open-source project work (llvm, WebKit, clang) and that the amount of that work is representative of Apple's commitment to the project.
In comparison, if you do similar stats on other Apple projects (like llvm, WebKit) you'll see that they have order of magnitude more people working on them, producing order of magnitude more code.