I'd like to know more about certain features I sometimes notice. Can you guys comment on the following? (...regional or not, what kinds of people use them, general info, etc.)

1 - American English with non tapped T's - It is basically General American, but the T's are not tapped.

2 - Wha'ever - Glottal stop instead of tapped T in words like "whatever".

3 - No liaisons - T+Y doesn't become CH, D+Y doesn't become J as in "juice", etc. The Y-sound is not merged with the preceding sound.

Thanks Emotion: smile
1 - Sounds pedantic to me.
2 - A coworker who had come from the East Coast spoke this way. ca'alog for cadalog ("catalog"). It seems to me he was from New Jersey. I think I've heard people from Georgia speak this way as well. It could be regional. I hardly ever hear it here in California, and I didn't hear it often when I lived in the Midwest either.
3 - Between words (" I don't know what you're doing" -- unreleased T plus Y), it strikes me as a normal and unremarkable variant -- an attempt to speak clearly. Within words ("picture" -- with a clear KTY combination), it sounds very pedantic.

Jim, I almost forgot I asked this question! Emotion: stick out tongue

Thanks, very interesting.
I just wanted to add something about #1. You said "sounds pedantic to me". Well, you know where I hear that? On some online dictionaries! The American Heritage Dictionary never taps the T's, and sometimes the Merriam Webster doesn't tap some T's either. I hate it! LOL. If you are curious, here you go:

These are from the American Heritage Dictionary. American! LOL.
Matter - http://www.bartleby.com/61/wavs/51/M0155100.wav
Electricity - http://www.bartleby.com/61/wavs/29/E0072900.wav

Anyway, I never pronunce those words that way, and I never hear anyone pronunce them that way, except for some dictionary and some characters in some animated cartoons. Emotion: wink
Students: We have free audio pronunciation exercises.
Well, you know where I hear that? On some online dictionaries!
Argh! I listened to those. The pronunciation of "matter" struck me as silly -- totally artificial. The pronunciation of "electricity" did not bother me as much since the final syllable ty has a secondary stress. Most of the -ity words allow for variants of the T sound, in the sense that you may hear a T with some aspiration or none at all or a D sound. It depends on speaker preference, rate of speed, and register.

Hi again Jim,
I was thinking about.. feature #3 again. I wonder if T + Y is CH when the word starting with Y is stressed. Here's an example, consider the stress on "him" and "you":

I'm not talking about him, I'm talking about you...

Can that "about you" be pronounced in both ways (CH or glottal stop), or is only a glottal stop possible? I don't know why I'm having such doubts, but I feel I would only use a glottal stop if the word starting with Y is actually stressed in the sentence.

What do you think? Thanks Emotion: smile
(What you call a glottal stop I call an unreleased T.)

I feel I would only use a glottal stop if the word starting with Y is actually stressed in the sentence.
You got it! Trust your instincts on this one. Emotion: wink

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Ok, thanks!
English is so difficult... there are always a lot of features learners are not aware of. And natives aren't aware of them either, by the way. And so many varieties, so many ways of speaking... Well, that's also why it is so interesting. Emotion: smile