Not trying to nitpick but I'm confused as to why you voted "yes". We often talk on here about golf as a gentleman's game and importance of self policing of the rules. The Rules of Golf define a "hole" as;
While it is still a great achievement, if all our golf achievements are based on playing by the ROG, then in theory it's a hole in one but not a hole in one in accordance with the Rules of Golf which is what I believe the OP was asking.
I never said it was a hole-in-one under the Rules of Golf. I just said it "counted" if he thought it counted. What's it to anyone else? Him claiming that hole in one doesn't diminish anyone else's accomplishments.
I had severa holes in one the other day at mini golf. They "counted" too. One even occurred on a hole where the average score was nearly 4 excluding my ace.
I don't believe the OP was asking whether it was a HIO "in accordance with the Rules of Golf." They weren't playing "golf" under the RoG, so…