Frankly, She can get either a Macbook Pro or a Windows Laptop. It matters less and less which you get. I say this a web designer and graphic designer.
Some things:
At least 4gb ram...If you go Mac, listen to what Medievalist and other are saying, don't buy extra from Apple go and max it out with a good third party.
At least 512mb video card. 1gb would be better so would two 512mb but they get pretty expensive.
Other than that: optical drive can be included or separate. If you get a Mac and it doesn't have an SD card slot, get a reader for her...they are pretty inexpensive now, some just come with the cards.
If you go Windows Laptop, get Windows 7...don't down grade to XP or Vista.
Did the adviser say anything about 3d or software types other than Adobe Suite That she'd be using? Might want to check software specs for those. But, usually this is available to use in the computer lab.