Yes, same here. The click sound of the space bar is considerably higher pitched than any of the other keys. But then again, all the bigger keys (shift, enter, backspace) do sound different. At fist I wasn't so happy about it, but now got used to it.
Thanks Gundy for confirming I am not the only one.
This is very disappointing and unacceptable to me especially given all the other small issues my laptop has (backlight bleed, whiny fan, AWFUL touchpad).
Just got my RMA and am sending it back. I can't believe Lenovo is making me pay 15% plus return shipping. I feel like I've been robbed, and will never buy from this company ever again. RIP ThinkPads. Truly a shame.