There may be no 'I' in team, but there is one in leadershIp.
Personally, I get pretty annoyed when people say 'we' when they mean 'I'.
My group's leaders have trouble with this, too, from time to time. We try and realize that 'I' means our personal ideas, research, experience, etc. and 'we' means something that has been discussed or something that has been done for years. (Or decided by someone we have empowered to make a decision).
As president, in meetings, I always follow up "I think we should ..." with "What do you think?"
When noone says anything, I remind them, tongue in cheek, that I was hoping for a discussion.
dlf is right -- when things work well, everyone will share the credit, but if something goes wrong, it is all YOU. It happens here just about weekly.
Fortunately, I have developed antibodies.