Apple is the favorite — once again — in Piper Jaffray’s 23rd semi-annual teen survey

“The bottom line,” writes Gene Munster in a note summarizing the results of Piper Jaffray’s latest survey of the aspirations of American teenagers, “is that 40% of students plan on buying an iPhone in the next 6 months while 19% of non-tablet owners plan on purchasing a tablet in the next 6 months.”

Wishes, of course, can’t always be iPads. As Munster’s chart below shows, teenagers invariably want more Apple (AAPL) devices than they get.

Last fall, 38% of the students surveyed said they planned to buy an iPhone within six months, but six months later the percentage who own one had only increased 11 points, from 23% to 34%.