Don't know if this is related, but I initially had a problem with not enough rotational space around the cleat to be able to unclip properly - ie. the raised sole around the cleat limited how much I could twist my foot. I took a stanley knife to the sole and carved out a bit of sole - this fixed the problem. After even a little wear I find Time ATAC's release real easy, so maybe this is your problem?
Don't know if this is related, but I initially had a problem with not enough rotational space around the cleat to be able to unclip properly - ie. the raised sole around the cleat limited how much I could twist my foot. I took a stanley knife to the sole and carved out a bit of sole - this fixed the problem. After even a little wear I find Time ATAC's release real easy, so maybe this is your problem?