Actual data (APPIC surveys) indicates that 1-2% of applicants in any given year have 10+ peer reviewed publications when they apply and about 10% have 5 or more. No data on authorship order is available, unfortunately. Interestingly. APPIC finally gave us a full range with the 2015 data. It tops out 28, and previously years have shown that about .1-.3% of applicants have 20+ peer-reviewed publications. Mot applicants overall have 0 at application time, and most PhD applicants have 2 or fewer. Having any publications at all is linked to consistently higher match rates, although that doesn't control for possible confounding variables.
Also, as Ollie notes, different sites and different subfields will look for different things in a pub record. For example, I recently had a publication accepted in a fairly high IF journal (IF= ~4), but I actually may have been just as well off--or maybe even better off?--had it been in a lower IF journal but one in my subfield, because those subfield journals tend to jump out to the people who I'd like to hire me as "good journals!" whereas this one is probably relatively unknown to them. I'm really happy with the acceptance and I'm not trying to look a gifthorse in the mouth, mind you, but it's just something I noticed. Also, some journals have prestige that goes above their IF, so to speak. APA journals in particular seem to carry added, "above IF" prestige in my experience, as well as some subfield specific journals that have notably better reputations in the subfield than their IFs might suggest at first glance.
As an aside, please don't insult people who have a lot of publications just because they have a lot of publications. I have an "outlier" number of pubs (30+, ~40% first-author), and I've had so many people, including faculty, make weird comments about it, like saying that I must not have done any actual work on them, that it's weird, or even insinuating that it's unhealthy or that I must do nothing else but publish (my collaborators only *wish* that were true, trust me!
), etc. Without trying to make this seem like a "my diamond shoes are too tight!" problem, it actually is a bit hurtful to put in a lot of work to do well at something and then just get passive-aggressive doubt in return.
Congrats on the almost (?) 20 publications,
@Ollie123 ! Eight in a year is very impressive, especially on internship!