I don't think so. Say you went to LR-35 initial and logged 24 hours of Lear 35 time in the Level C (or B or D, same difference) sim. Then you flew 100 hours in a Lear 35. You have now logged 124 hours of Lear 35 time.
Actually, I think you need a C or D to do a sim-only type rating, at least according to Part 61, which references Part 142. Also, I believe that the ATP/type rating PTS provides a "task vs. simulation credit" chart, and that indicates a few maneuvers for which sim credit is given only in a C or D.
An applicant for an initial type rating who does not meet the requisite experience criteria (61.63, 61.157--for a sim-only, unrestricted type rating) and who obtains his/her rating in a (C or D) sim-only program will have a limitation on the type rating which will probably require 15-25 hours of supervised PIC in the airplane. In your hypothetical, say the newly rated pilot has his/her 24 hours of sim, with a limitation on the type rating (assuming pilot does not meet the experience requirements for unrestricted sim-only type rating), and then acquires the 25 airplane hours needed to remove the limitation. Does that person now have 49 hours "in the Lear 35"?
(the 24 hours in the sim, and the 25 hours in the airplane to remove the limitation on the type rating) Consider that had the type rating been accomplished in an airplane, not a sim, the same pilot's type rating would be unrestricted ab initio. And the restricted pilot may not simply log more sim time to remove the restriction.
This might be an area where there is some ambiguity, but I think the pilot in your 124 hour hypo has 24 hours sim (Lear 35 sim, if you prefer) and 100 hours "in a Lear 35". But, as I said, this area is not without some ambiguity.
I recall seeing some discussion of this (logging of sim time) on one of the sim school's websites, but can't find it now.
Incidentally, it is the practice of a couple of IGIs I know at an approved school (who are not CFIIs) to act as authorized instuctors within the meaning of the FARs when it comes to instrument currency time (and possibly other instrument dual, I don't know) in the school's FTD. Just thought I'd throw that out there. Kind of suggests (to me, anyway) that the time spent with these IGIs on the FTD is not "flight time". And, although this partcular FTD supposedly replicates a PA-31, most FTDs don't replicate a particular type. The original post was about Level D sim time. But note that most of the FAR references to logging (at least the ones cited earlier in this thread, e.g., 61.51) don't distinguish between FTD, sim, or between different levels, so type replication might not matter when it comes to logging as sim, flight, total time, etc.