Recently there was an update to Gimkit that added platforming physics to Gimkit Creative. This unintentionally had the side effect of changing the physics of Don't Look Down to where speed boosts are noticeably less powerful. All runs using the old physics have been moved to a miscellaneous category. This physics change hopefully will not last since the creator of the game has confirmed that the physics change to Don't Look Down was unintentional and he's going to try his best to revert it back to normal.
You may have noticed that miscellaneous categories from this game have been removed. All of these categories have been made on the Category Extensions page. All runs (including obsolete ones) from these categories have been submitted on the runners behalf by me. The date, description, and all other
