Okay my friend is 18, in college, and works at BEST BUY(she has savings though) yet she got approved for a $200K mortgage with $40K down. (the house is for her + her mom; she's splitting the down payment + mortgage with her mom, but she got the mortgage itself only in her name, since her mom's credit is cr@p from a recent bankruptcy)

Then there is my other friend, who has good income(he's a cop) but his credit score is only in the low-to-mid-600s...he got approved for a mortgage too and it's not his first one either.

Then there's me. I make mediocre income(over $30K/yr), my credit score is 700-730, I have no credit card debt, & I'm on my way to paying off my car loan by Halloween, more than 3 yrs early(I only owe $7K on an original $26K). Yet my male acquaintence claims that I shouldn't expect to get approved for a mortgage unless I have 50% down! Why would he have such little faith in me? Esp when others get approved? Is he telling me good advice or just being a jerk? Ideas?
Additional Details
Yeah I figured my "friend" was full of s--t. I mostly only wrote this question to prove to myself and him that he was just trying to give me a put-down. His name is Rob C. and he thinks he's a know-it-all and superior to me just because he was able to get a high-end engineer job before he even finished college, whereas it took me literally several yrs after college graduation before I found something that actually paid better than $7.50/hr. I think I'm going to show him this to put him in his place.