As many of you well know, September 6 was the date that candidates could start applying to ACGME-accredited residency programs (and September 15 will be the date that ACGME-accredited residency programs start receiving applications). I am a big fan of getting your ERAS in on the early side: It demonstrates commitment, and when I was reviewing applications as an Assistant Residency Director, I found my workload was lighter earlier, allowing me more time to spend on those initial applications.
Having said that, do not over focus on an early application such that your written materials are suboptimal. Every year I encounter panicked candidates who want to submit their poorly written documents simply to get them in, shooting themselves in the proverbial foot.