Won't matter - no matter how many times they find a link (and they have), creationists just retort that "you haven't found EVERY link!". It won't convince a single creationist of anything since they've already decided that evolution isn't true. It's a moving goal-post - every time scientists answer a creationist argument, they just make up a new one or move the goal post back. Creationists said there was never an instance of an organism changing due to environmental pressure. When scientists proved that bacteria could respond to selection, the creationists just moved the goal further back. Creationists said there was never a single fossil that showed a link between species - when scientists found real missing links, the creationists just retorted "nyah, nyah, you haven't found EVERY link!".
I don't care to debate with creationists anymore. At least, not the committed ones. They're brainwashed to believe whatever their pastor tells them. Few, if any, have any real backgrounds in genetics or biology. They don't know the science, yet they feel capable of criticising it. That shows the mindset they have - they're ignorant and proud of it, and they feel as if their ignorance trumps knowledge.
Until creationists actually get a proper education (and no, reading Answers in Genesis is not a proper education) or are WILLING to REALLY listen to the arguments of evolutionary biologists, there's no point in debating them. They're not listening to you, they never will.