Well, this happens also on Samsung S2 and others as well, but they were considered "old devices" previously when people tried to report this. However, I get many emails lately that after upgrading to Android 4.4, typing on my board became very slow. It's so slow that letters in words are sometimes shown mixed up since users don't get instant feedback about their typing. When they use the BB-Code editor everything works fine, but that's not really a solution. To confirm that, they tried to type here as well and they got the same result.