Based on family experience some people get approved in hours or days some take weeks if for some reason they get flagged for further investigation, such as criminal record or mistakes in the application or even in some cases people who are PRs applying.
Nobody here can really tell you how long you just need to pay the nominal fee and apply. Having a green card or being from the Phillipines probably does not make any difference to the turnaround maybe it will maybe it wil not.
Not sure why you thought Jalex was being rude you asked a question and were given a best guess realistic generic answer. Keep in mind that many people that use this forum cannot apply for an ETA in the first place so there is not a lot of knowledge sharing on ETA applications here.