The Zig compiler has used Data Oriented Design for a long time, so any recent version has that, yes. The most substantial part of running the compiler right now is LLVM, hence the focus to provide an alternative. The other big focus right now is incremental compilation, which will make recompilations very fast.
Also, do you know when the changes Andrew mentioned in his "Data Oriented Design" are going to be released in the zig compiler?
I would expect that when both of the above are done, compiling Zig will be really, really fast compared to anything we currently have.