+1, a tad is the word i would use, 'very' warm would be something else. I think the word very entitles that it is not a little warm but a rather large amount, if something is 'very' bassy then it would be something you recommend to bassheads.
Do you know what happens to the IEMs when their ports get clogged (by earwax, oil secretions, etc)? This happens:
Note the flat frequency response of the bass. Source of graph is innerfidelity. Furthermore, Rin even confirms this in his own findings... He manually filled the port, I know Tyll didn't... Tyll's 900s naturally filled (as I asked for you to use and let them do, but I have a feeling you never did ;)).
Please compare raw graphs, not compensated ones...
I have been using them a lot, mine have not naturally filled because my ears are extremely clean, i have them washed out for two hours every morning and night when i swim and i do not have a very big wax build up because of this. Anyway, done it manyally like rin now so we shall see.