Yes they're now very long GPU tasks indeed at GPUGrid.
Wasn't too pleased myself when I went back to GPUGrid a few weeks ago and the first task I received took over 20 hours. Not only is that longer than I like for GPU tasks because I prefer to run them without interruption but it's also getting close to the 24 hour deadline for 50% bonus credit, especially considering the slow upload after completion.
It's settled down since then and the longest tasks I'm now receiving complete in about 16 hours on my GTX 970 @ default speed with SWAN_SYNC. The PABLO_xxxxxx_x_IDP type that you're crunching take me about 11 hours and grant 252,750 credits including 50% <24 hour bonus.
For my current 22 valid tasks, here's the distribution, credit (including 50% bonus) and approx. runtimes:
3 of ADRIA_FOLDA3D01_crystal_ss_contacts_50_a3D - 137,850 credits - 6.5 hours
2 of PABLO_xxxx_adap - 157,200 credits - 7.2 hours
12 of PABLO_xxxxxx_x_IDP - 252,750 credits - 11 hours
1 of PABLO_boundxxxxxxxxx - 277,950 credits - 12.4 hours
4 of PABLO_all_data_goal - 421,800 credits - 15.3 to 16 hours
It's unfortunate that short tasks are apparently very rare now because of those 5 long types listed above, only the 2 shortest running types would finish in under 24 hours on a GTX 750 TI. Your screenshot shows that PABLO_xxxxxx_x_IDP would complete in almost exactly 24 hours but the long upload would take it over and credit would drop from 252,750 (50% bonus) for under 24 hours return to 210,625 (25% bonus) for under 48 hours return. Although possibly that's still better than some other credit stingy GPU projects I suppose.
I select only long tasks in project preferences because of the higher credit rate than short tasks. Short tasks only would definitely be the best choice for a GTX 750 TI though but current scarcity of shorties makes it a very difficult project to support for owners of GTX 750 TI and similar speed cards.
The bonus credit system combined with long tasks is a bit awkward to work with even with my GTX 970. Either have to set my cache really small to avoiding having more than one task in cache at a time for longer than a few hours or set "No new tasks" and download manually after completing each task. In the first case this limits the cache of CPU tasks of other projects, which can be inconvenient on projects where work availability is unreliable or sporadic. In the second case it means if a GPUGrid task finishes while I'm asleep the slight change in fan noise or drop in bedroom temperature doesn't always wake me so my GPU remains idle for a while.
Still, the challenge of working around the foibles and annoyances of projects I wish to support adds to the interest. If it all worked easily and required no knowledge or configuration tweaks to extract better performance then the appeal of crunching would soon wither away.
On the positive side, the tasks run smoothly for me with no errors and card temperature is low. Credit is slightly lower than it used to be last year but still quite good, about 550K-600K per day. Was going to stop about now, because don't want the winter power bill to be too high, but with 2 computers now instead of one and GPU crunching as well haven't needed a bedroom heater at all this winter, even though July had the coldest minimum temperatures here for 15 years. So GPUGrid for another week or two here I think.
