Normally I would agree with LunacyOfficial, a long start to a song can make the listener bored.
However, this song is over six minutes long, so I would honestly be disappointed if it didn't have a long intro.
Much like in trance, progressive house really needs some time to set the mood, hence the name, "Progressive House".
I really liked this song, house is the genre I've been trying to focus on the most, but it seems I need to take some notes.
This is how it's done.