FOLLOW UP . . .
Ok, so this is what happened: Brought the car back to the dealership, gave the new guy the story, then the original "customer service" guy wandered over, along with a mechanic. I said they have to a) replace the fuse back to a 10amp, and b) tell me why the fuse blew - whether the pump is drawing too many amps or if there is a short in the wire. Only to have 3 wonderful (insert sarcasm there) guys all surround me saying its OK to replace fuses with higher amp fuses... ha ha. So, me trying to keep an eye on crazy-2yr old told them no, fix it, and walked away.....
Result: They replaced it back to a 10amp (doubled checked, since now i know how!), and they said since the washer fluid was 2 years old, it broke down and there must have been ice in the line, it froze, then the fuse blew (would make since, but i never held down the sprayer for long when checking it). They did say they checked the pump's draw and if there was a short in the line, and found nothing (I made the service guy put that all in writing).
I'm in Ohio, day time is lower 30's, night time in the 10's 20's. However, last weekend I was driving 60 mph for 45 minutes, tried the washer, and nothing. Seems like any ice would have melted if there was anything frozen...
In the meantime, drove home and used up almost all the washer fluid. Going to fill 'er up with new fluid (rated for winter), then flush it through the front and back lines. Hopefully, it WAS just ice, and the fuse won't blow again.
Anyway, still a little ticked that they pulled the "no, its ok to put a higher amp fuse in there!" line - when even the car's booklet says not to! urgh. Too bad my daughter behaved well, I was secretly hoping she'd smear little finger prints all over the show room cars ; )
Thanks for all the input!