It "should" since the minimum "high" voltage on a digital input is 2.7vdc for an Atmel running on a 5VDC power supply, IIRC.
Question is though, do you feel lucky? Since I rarely breadboard, I rely on solutions that ought to work 100% of the time. I have had great success with level-shifting via the TXB series on the SPI bus. So, I'll keep adding the three chips necessary (one IC, two decoupling caps) and call it a day.