I've encouraged a number of people to give Linux a try on the desktop, and I've heard a complaint or two about it being too different, hard to use or missing so

I've encouraged a number of people to give Linux a try on the desktop, and I've heard a complaint or two about it being too different, hard to use or missing some feature the complainer liked from another OS. I have never heard slow/unresponsive among the complaints. I've only heard this complaint from people who understood how X works and fundamentally disagreed with the design.