This is one editor's observations / opinions, based on a couple of years' worth of reviewing drafts. It is not a policy nor a guideline, but the kind of advice I try to give to draft creators.
When you submit a draft through the Articles for Creation process, a reviewer will read it, evaluate it, and decide if it is ready to be an encyclopedia article. There are a number of things for the reviewer to look for, and the time it takes until a draft is reviewed can vary quite a lot. Often, drafts have problems that take some time for a reviewer to check before the draft is declined; if you look for those before you submit and do your best to fix them, you might make the process quicker and reduce the risk that the draft is declined.