such quick service.. or is it?

[hiren04]

I went to the dealer today for my appointment. I needed to get an oil change done, because i havent gotten one since i bought the car. So, today i went in by 3:30pm, and gave them the keys. Around 5:15pm, i asked how long it will still be, and he told me atleast another 30 to 45 min. I waited around, and saw the car getting pulled in around 5:32pm. At exactly 5:58pm (25 min later) the car associate gave me the keys and told me im all set. I saw the tech take the car out for a spin to check on other things like brakes and such so that probably took about 15 min atleast. Do you think its really possible to do an oil change in 10 min? OR did they not do anything at all when they took the car in? Its a 2007 3.0si with 9,880 miles. I bought it with 8,500 miles on it just about 6 weeks ago.

is there any way to know if the oil was actually changed?