oh...
Before seeing this thread I found the article rather charming...
I thought the choking and drinking were all part of the proof "He was a mess and pretty irresponsible" and then he ends up completely changed by the experience of spending time alone with his daughter due to an unexpected overwhelming feeling of very deep love for her.
In my case that overwhelming feeling of love happened at the scan seeing that tiny human like form - it really hit me "This is parent love and it is amazing.". For my DH it happened the first time dd smiled. He hadn't understood until that moment why I cried so much at the scan... but after sobbing for Enland at her smile - he got it!!!
OK in the article - it seems quite late for the 'love attack' for want of a better name to kick in - but I think that is actually what he is writing about... not about how great he is for looking after his daughter for a day and a night but what it feels like to realise this feeling of love and highlighting that it doesn't always happen at birth or at the pregnancy test stage of being a parent!
Of course DH and I have both felt similar sensations later - for me I felt it again when she first walked, when I kiss her good night and more recently when she held a lamb at a farm. However, nothing as mindblowing as that first realisation - this is my child and I love her in a way I never knew I could.
A friend of mine said she never got that feeling...her love for her son is more slow paced and ever growing. She never had the can't stop crying, buzz and amazing high of that delicious first completely overwhelming "love attack"(Does this moment have an official name because I find "love attack" very lacking? - best I could think of - sorry). So maybe what Dueren describes here is a bit risky because it doesn't happen to everyone.
Perhaps infact it has just happened to me, DH and Nick Duerden - However knowing what I know about all the parents I know in rl and here on mn too I do seriously doubt it!