The study presents a model for estimating Ethereum transaction speeds, focusing on simplicity and transparency.They evaluate the accuracy of prediction models provided by Etherscan and EthGasStation.A post-hoc study aims to derive a simpler, more interpretable model compared to existing models.Utilizing linear regression for prediction while engineering a historical feature for Ethereum transaction processing.The study uses a sliding-time-window-based model validation approach for robustness.Comparative analysis with state-of-the-practice model reveals similar accuracy at a global level.The linear regression model outperforms for 'very cheap' and 'cheap' price categories.Findings show potential cost-saving opportunities for users based on accurate predictions.Authors include Michael Pacheco, Gustavo A. Oliva, Gopi Krishnan Rajbahadur, and Ahmed E. Hassan.The paper is available on arxiv under CC BY-NC-ND 4.0 DEED license.