Vladimir --
D-76 does indeed work well fwith Delta 3200. The problem is that Ilford seems to have underestimated the development times on their chart. For whatever EI you rate that film at, develop it for the time the chart recommends for twice that EI. In other words, if you rate the film at 3200, use the recommended time for 6400, which is 13 minutes at 68 F. Be sure to use the D-76 undiluted and discard after use.
I have used Delta 3200 for years now at various EI's using the above protocol with excellent results, and from time to time I have read posts from other users that concur with the extended development times.
Regarding the above post and T-Max developer, I'm sure it can be used with Delta 3200, but T-Max is a Kodak developer, and Delta 3200 is an Ilford film, so I'm doubtful that Kodak spent large amounts of money to create a system to match the two, especially since Kodak has it's own 3200 film.
Best Regards,
Dave