Ok there are a ton of insecure guys on this board (at least from what i've read, not just this thread.) So I want to break down female orgams like this.
In a word, every girl is different.
To the degree of your sexual prawless in bed, size of your cock, use of your tounge, these play an important role but dont judge yourself based on one or two girls.
I've been with many many many girls. I'll be the first to admit I didn't get some of them off, (oh well their loss). I've had girls that cum during sex so often the sheets are a wet mess afterwards. Some girls like gentle, some like getting rammed! Some get off in a certin position only etc. My gf who i've been with for quite a while actually gave me a bit of a complex cause she can't get off during intercourse easily, i ususally have to get my tounge in there and give her an clitoral orgasm as she doesn't have g-spot orgasms (and yes, i have the 'equipment' to get the job done). This bugged me for a while, but even with direct tounge contact it takes time. It gave me a bit of a complex until I realised that there is nothing hotter in the wolrd then her climaxing grabbing my hair with my head in her lap. It's fantastic!
So in conclusion every girl is different, one giant orgasm or several smaller ones, it's all good! (as long as I get off too!)