Definitelya 2.5... but your friend who says he would go 120" needs either A) a lesson in how to score a deer, or B) to stop smoking so much purple.

He's about 90-95".

*Edit-- Also, remember this is late summer so the deer will look quite a bit skinnier than he does in a full coat. Maybe this is why you think he is a 1.5 yr old. Either way, look at his stomach and chest and how developed they are--For this time in the summer a 1.5 will look like a doe with horns. Skinny and lanky.